Changed repo organisation

Tout simplement pcq je suis trop con, un putain d'abruti fini, une merde croulant sous le poids de sa propre incompétence

.gitignore

@@ -6,3 +6,5 @@
 *.log
 *.core
 httpd
+__pycache__
+env/

Makefile

@@ -0,0 +1,57 @@
+CC = gcc
+CFLAGS = -std=c99 -Werror -Wall -Wextra -Wvla -pedantic
+LDFLAGS =
+LDLIBS =
+
+CFLAGS_DBG = -g
+ASAN_DBG_FLAGS = -fsanitize=address 
+
+UTILS_SRCS = src/utils/string/string.c \
+			 src/utils/time/fmt_time.c \
+			 src/utils/parsing/words.c \
+			 src/utils/parsing/blanks.c \
+			 src/utils/files/files.c
+MODULES_SRCS = src/config/config.c \
+			   src/server/server.c \
+			   src/http/http.c \
+			   src/http/headers.c \
+			   src/logger/logs.c \
+			   src/logger/errors.c \
+			   src/daemon/daemon.c
+SRCS = $(UTILS_SRCS) \
+	   $(MODULES_SRCS) \
+	   src/main.c
+
+UTILS_OBJS = ${UTILS_SRCS:.c=.o}
+MODULES_OBJS = ${MODULES_SRCS:.c=.o}
+OBJS = ${SRCS:.c=.o}
+
+TARGET=httpd
+
+$(TARGET): $(OBJS)
+	$(CC) -o $@ $(OBJS) $(LDFLAGS) $(LDLIBS) 
+
+check: $(TARGET)
+	cp $(TARGET) tests/$(TARGET)
+	cd tests
+	python3 -m venv env
+	env/bin/python -m pip install requests
+	env/bin/python -m pip install pytest
+	env/bin/python -m pip install pytest-timeout
+	- env/bin/pytest
+
+debug: CFLAGS += $(CFLAGS_DBG)
+debug: $(OBJS)
+	$(CC) -o $(TARGET) $(OBJS) $(LDFLAGS) $(LDLIBS) 
+
+	
+asan: CFLAGS += $(CFLAGS_DBG)
+asan: LDFLAGS += $(ASAN_DBG_FLAGS)
+asan: $(OBJS)
+	$(CC) -o $(TARGET) $(OBJS) $(LDFLAGS) $(LDLIBS) 
+
+clean:
+	- pkill -9 $(TARGET)
+	$(RM) tests/$(TARGET) tests/out.log
+	$(RM) $(TARGET)
+	$(RM) $(OBJS)

httpd/Makefile

@@ -1,37 +0,0 @@
-CC = gcc
-CFLAGS = -std=c99 -Werror -Wall -Wextra -Wvla -pedantic
-LDFLAGS =
-LDLIBS =
-
-CFLAGS_DBG = -g
-ASAN_DBG_FLAGS = -fsanitize=address 
-
-UTILS_SRCS = src/utils/string/string.c
-CONFIG_SRCS = src/config/config.c
-SRCS = $(UTILS_SRCS) $(CONFIG_SRCS) src/main.c
-
-UTILS_OBJS = ${UTILS_SRCS:.c=.o}
-CONFIG_OBJS = ${CONFIG_SRCS:.c=.o}
-OBJS = ${SRCS:.c=.o}
-
-TARGET=httpd
-
-$(TARGET): $(OBJS)
-	$(CC) -o $@ $(OBJS) $(LDFLAGS) $(LDLIBS) 
-
-check:
-	dash tests/run.sh
-
-debug: CFLAGS += $(CFLAGS_DBG)
-debug: $(OBJS)
-	$(CC) -o $(TARGET) $(OBJS) $(LDFLAGS) $(LDLIBS) 
-
-	
-asan: CFLAGS += $(CFLAGS_DBG)
-asan: LDFLAGS += $(ASAN_DBG_FLAGS)
-asan: $(OBJS)
-	$(CC) -o $(TARGET) $(OBJS) $(LDFLAGS) $(LDLIBS) 
-
-clean:
-	$(RM) $(TARGET)
-	$(RM) $(OBJS)

httpd/src/main.c

@@ -1,10 +0,0 @@
-#include <getopt.h>
-#include <stdio.h>
-
-#include "config/config.h"
-
-int main(int argc, char **argv)
-{
-    parse_configuration(argc, argv);
-    return 0;
-}

httpd/src/utils/string/string.c

@@ -1,77 +0,0 @@
-#include "string.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-struct string *string_create(const char *str, size_t size)
-{
-    struct string *res = malloc(sizeof(struct string));
-    if (res == NULL)
-        return NULL;
-
-    res->data = malloc(size * sizeof(char));
-    if (res->data == NULL)
-    {
-        free(res);
-        return NULL;
-    }
-
-    memcpy(res->data, str, size);
-    res->size = size;
-    return res;
-}
-
-int string_compare_n_str(const struct string *str1, const char *str2, size_t n)
-{
-    size_t i = 0;
-    int res = 0;
-    char reached_str2_end = 0;
-    while (i < n)
-    {
-        if (i < str1->size)
-            res += str1->data[i];
-
-        if (!reached_str2_end)
-        {
-            if (str2[i] == '\0')
-                reached_str2_end = 1;
-            else
-                res -= str2[i];
-        }
-
-        i++;
-    }
-
-    return res;
-}
-
-void string_concat_str(struct string *str, const char *to_concat, size_t size)
-{
-    size_t new_size = str->size + size;
-    size_t str_size = str->size;
-
-    if (new_size == 0)
-        return;
-
-    str->size = new_size;
-    str->data = realloc(str->data, new_size);
-    if (str->data == NULL)
-        return; // Handle ?
-
-    for (size_t i = 0; i < size; i++)
-    {
-        str->data[str_size + i] = to_concat[i];
-    }
-}
-
-void string_destroy(struct string *str)
-{
-    if (str != NULL)
-    {
-        if (str->data != NULL)
-        {
-            free(str->data);
-        }
-        free(str);
-    }
-}

src/config/config.c

@@ -5,8 +5,8 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "../utils/string/string.h"
+// #include "../utils/string/string.h"
-#include "bits/getopt_ext.h"
+// #include "bits/getopt_ext.h"
 
 #define ARG_VALID 0
 #define ARG_INVALID 1
@@ -50,6 +50,10 @@ static void print_help(char *program_name)
 // limit imposed by school
 static int parse_daemon_arg(struct config *cfg)
 {
+    // Multiple contradictory parameters
+    if (cfg->daemon != NO_OPTION)
+        return ARG_INVALID;
+
     if (strcmp(optarg, "start") == 0)
         cfg->daemon = START;
     else if (strcmp(optarg, "stop") == 0)
@@ -97,7 +101,7 @@ static int handle_opt(char **argv, char opt, struct config *cfg)
 
     // Server name
     case 's':
-        cfg->servers->server_name = string_create(optarg, strlen(optarg));
+        cfg->servers->server_name = optarg;
         break;
 
     // Port
@@ -176,11 +180,25 @@ static void print_arg_error(int err, char **argv, struct option options[],
     }
 }
 
+// static void apply_default_values(struct config *cfg)
+// {
+//     // Default file
+//     if (cfg->servers->default_file == NULL)
+//     {
+//         char *default_df = DEFAULT_DF;
+//         cfg->servers->default_file =
+//             malloc((strlen(default_df) + 1) * sizeof(char));
+//         // TODO handle error
+//         strcpy(cfg->servers->default_file, default_df);
+//     }
+// }
+
 // == Main functions
 
 struct config *parse_configuration(int argc, char *argv[])
 {
-    struct option options[] = { // Global
+    struct option options[] = {
+        // Global
         { "daemon", required_argument, NULL, 'd' },
         { "help", no_argument, NULL, 'h' },
         // Vhosts
@@ -188,7 +206,7 @@ struct config *parse_configuration(int argc, char *argv[])
         { "port", required_argument, NULL, 'p' },
         { "ip", required_argument, NULL, 'i' },
         { "root_dir", required_argument, NULL, 'r' },
-                                { "defaut_file", required_argument, NULL, 'D' },
+        { "default_file", required_argument, NULL, 'D' },
         // Logging
         { "pid_file", required_argument, NULL, 'P' },
         { "log_file", required_argument, NULL, 'L' },
@@ -222,10 +240,12 @@ struct config *parse_configuration(int argc, char *argv[])
         }
     }
 
+    // apply_default_values(config);
+
     // Check config validity
     if (check_config(config) != 0)
     {
-        printf("%s: Missing mandatory flags, cannot continue.", argv[0]);
+        printf("%s: Missing mandatory flags, cannot continue.\n", argv[0]);
         config_destroy(config);
         return NULL;
     }
@@ -235,7 +255,6 @@ struct config *parse_configuration(int argc, char *argv[])
 
 void config_destroy(struct config *config)
 {
-    string_destroy(config->servers->server_name);
     free(config->servers);
     free(config);
 }

src/config/config.h

@@ -2,9 +2,13 @@
 #define CONFIG_H
 
 #define _XOPEN_SOURCE 500
+#define HTTP_VERSION "HTTP/1.1"
 
 #include <stdbool.h>
 
+// Default values
+#define DEFAULT_DF "index.html"
+
 /*
 ** @brief Enum daemon
 ** NO_OPTION if the '--daemon' option is not given
@@ -32,6 +36,7 @@ struct config
     char *pid_file;
     char *log_file;
     bool log;
+    char *protocol_version;
 
     struct server_config *servers;
     enum daemon daemon;
@@ -48,7 +53,7 @@ struct config
 */
 struct server_config
 {
-    struct string *server_name;
+    char *server_name;
     char *port;
     char *ip;
     char *root_dir;

src/daemon/daemon.c

@@ -0,0 +1,73 @@
+#include "daemon.h"
+
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "../server/server.h"
+#include "../utils/files/files.h"
+
+static struct config *config;
+
+// === Functions
+
+void daemon_init(struct config *cfg)
+{
+    config = cfg;
+}
+
+int get_pid(void)
+{
+    FILE *stream = fopen(config->pid_file, "r");
+    if (stream == NULL)
+        return -2;
+
+    char buf[10];
+    size_t nread = fread(buf, sizeof(char), 10, stream);
+    if (nread > 8) // PID is max 8 chars
+        return -3;
+    buf[nread] = '\0';
+
+    int res = atoi(buf);
+
+    fclose(stream);
+
+    return res;
+}
+
+void stop_daemon(void)
+{
+    int pid = get_pid();
+    if (pid > 0)
+        kill(pid, SIGINT);
+}
+
+int start_daemon(void)
+{
+    pid_t pid = fork();
+    if (!pid) // Daemon
+    {
+        start_server(config);
+    }
+    else // Parent
+    {
+        // Write pid
+        int err = write_pid(config->pid_file, pid);
+        if (err != 0)
+        {
+            kill(pid, SIGINT);
+            return 1;
+        }
+    }
+    return 0;
+}
+
+int restart_daemon(void)
+{
+    // Attempt to kill process
+    stop_daemon();
+
+    // Start again
+    return start_daemon();
+}

src/daemon/daemon.h

@@ -0,0 +1,30 @@
+#ifndef DAEMON_H
+#define DAEMON_H
+
+#include "../config/config.h"
+
+/* @brief
+ *
+ * @return
+ */
+int get_pid(void);
+
+/* @brief
+ */
+void daemon_init(struct config *cfg);
+
+/* @brief
+ */
+void stop_daemon(void);
+
+/* @brief
+ */
+int start_daemon(void);
+
+/* @brief
+ *
+ * @return
+ */
+int restart_daemon(void);
+
+#endif // ! DAEMON_H

src/http/headers.c

@@ -0,0 +1,162 @@
+#include "headers.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "../utils/parsing/words.h"
+#include "../utils/string/string.h"
+
+void destroy_headers(struct http_header *headers)
+{
+    while (headers != NULL)
+    {
+        struct http_header *next = headers->next;
+        string_destroy(headers->field);
+        string_destroy(headers->value);
+        free(headers);
+        headers = next;
+    }
+}
+
+ssize_t read_field(struct string *str, size_t offset, struct string **res)
+{
+    ssize_t nread = read_word_delim(str, offset, res, ":\n");
+    if (nread <= 0)
+        return ERR_HTTP_INVALID_INPUT;
+
+    if (str->size <= offset + nread || str->data[offset + nread] != ':')
+        return ERR_HTTP_INVALID_INPUT;
+
+    string_to_lowercase(*res);
+
+    return nread;
+}
+
+ssize_t read_value(struct string *str, size_t offset, struct string **res)
+{
+    ssize_t nread = read_word_delim(str, offset, res, "\n");
+    if (nread <= 0)
+        return ERR_HTTP_INVALID_INPUT;
+
+    if (str->size <= offset + nread || str->data[offset + nread] != '\n')
+        return ERR_HTTP_INVALID_INPUT;
+
+    // Trim trailing \r
+    if ((*res)->size > 0 && (*res)->data[(*res)->size - 1] == '\r')
+    {
+        (*res)->size--;
+    }
+
+    return nread;
+}
+
+ssize_t parse_headers(struct http_request *res, struct string *req,
+                      size_t offset)
+{
+    size_t i = offset;
+    struct http_header *header = NULL;
+
+    // Yes I know I do one useless allocation but I really don't care at this
+    // point
+    while (i < req->size && req->data[i] != '\n'
+           && req->data[i] != '\r') // ! Blank line
+    {
+        if (header == NULL)
+        {
+            // Init list
+            header = calloc(1, sizeof(struct http_header));
+            res->headers = header;
+        }
+        else
+        {
+            // Append
+            header->next = calloc(1, sizeof(struct http_header));
+            header = header->next;
+        }
+
+        // Check allocation
+        if (header == NULL)
+            return ERR_HTTP_OUT_OF_MEMORY;
+
+        // Read field
+        ssize_t nread = read_field(req, i, &header->field);
+        if (nread <= 0)
+            return nread; // Contains error code when negative
+
+        i += nread + 1;
+
+        // Read value
+        nread = read_value(req, i, &header->value);
+        if (nread <= 0)
+            return nread; // Contains error code when negative
+
+        i += nread + 1;
+    }
+
+    if (i < req->size && req->data[i] == '\r')
+        i++;
+    if (i < req->size && req->data[i] == '\n')
+        i++;
+
+    return i;
+}
+
+struct http_header *get_header(struct http_header *headers, const char *field)
+{
+    while (headers != NULL)
+    {
+        if (string_compare_n_str(headers->field, field, strlen(field)) == 0)
+            return headers;
+
+        headers = headers->next;
+    }
+
+    return NULL;
+}
+
+struct http_header *create_header(const char *field, const char *value)
+{
+    struct http_header *res = calloc(1, sizeof(struct http_header));
+    if (res == NULL)
+        return NULL;
+
+    // Field
+    ssize_t field_size = strlen(field);
+    if (field_size < 0)
+    {
+        free(res);
+        return NULL;
+    }
+    res->field = string_create(field, field_size);
+
+    // Value
+    ssize_t value_size = strlen(value);
+    if (value_size < 0)
+    {
+        string_destroy(res->field);
+        free(res);
+        return NULL;
+    }
+    res->value = string_create(value, value_size);
+
+    return res;
+}
+void append_header(struct http_header **list, struct http_header *element)
+{
+    if (list == NULL)
+        return;
+
+    if (*list == NULL)
+        *list = element;
+    else
+    {
+        struct http_header *cur_elt = *list;
+        while (cur_elt->next != NULL)
+        {
+            cur_elt = cur_elt->next;
+        }
+
+        cur_elt->next = element;
+    }
+}

src/http/headers.h

@@ -0,0 +1,82 @@
+#ifndef HEADERS_H
+#define HEADERS_H
+
+#include <stddef.h>
+#include <sys/types.h>
+
+#include "http.h"
+
+// === Functions
+
+/*
+ * @brief
+ *
+ * @param headers
+ */
+void destroy_headers(struct http_header *headers);
+
+/*
+ * @brief
+ *
+ * @param str
+ * @param offset
+ * @param res
+ *
+ * @return
+ */
+ssize_t read_field(struct string *str, size_t offset, struct string **res);
+
+/*
+ * @brief
+ *
+ * @param str
+ * @param offset
+ * @param res
+ *
+ * @return
+ */
+ssize_t read_value(struct string *str, size_t offset, struct string **res);
+
+/*
+ * @brief
+ *
+ * @param res
+ * @param req
+ * @param offset
+ *
+ * @return
+ */
+ssize_t parse_headers(struct http_request *res, struct string *req,
+                      size_t offset);
+
+/*
+ * @brief
+ *
+ * @param headers
+ * @param field
+ *
+ * @return
+ */
+struct http_header *get_header(struct http_header *headers, const char *field);
+
+/*
+ * @brief
+ *
+ * @param field
+ * @param value
+ *
+ * @return
+ */
+struct http_header *create_header(const char *field, const char *value);
+
+/*
+ * @brief
+ *
+ * @param field
+ * @param value
+ *
+ * @return
+ */
+void append_header(struct http_header **list, struct http_header *element);
+
+#endif // ! HEADERS_H

src/http/http.c

@@ -0,0 +1,511 @@
+#include "http.h"
+
+#include <fcntl.h>
+#include <limits.h>
+// #include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/sendfile.h>
+#include <sys/socket.h>
+
+#include "../config/config.h"
+#include "../logger/logs.h"
+#include "../utils/files/files.h"
+#include "../utils/parsing/words.h"
+#include "../utils/time/fmt_time.h"
+#include "headers.h"
+
+// === Static variables
+
+static struct config *config;
+
+// === Static functions
+
+// Parses the status line of req, stores the result in res and returns the
+// number of read characters or a negative number on error
+// WARNING res must be pre allocated
+// (See the header for error codes)
+static ssize_t parse_reqline(struct http_request *res, struct string *req)
+{
+    ssize_t i = 0;
+    ssize_t skipped;
+
+    if (res == NULL || req == NULL)
+        return ERR_HTTP_INTERNAL_ERROR;
+
+    // Method
+    if (string_compare_n_str(req, "GET", strlen("GET")) == 0)
+    {
+        res->method = GET;
+        i += strlen("GET");
+    }
+    else if (string_compare_n_str(req, "HEAD", strlen("HEAD")) == 0)
+    {
+        res->method = HEAD;
+        i += strlen("HEAD");
+    }
+    else
+        return ERR_HTTP_NOT_IMPLEMENTED;
+
+    // Skip space
+    if (req->data[i++] != ' ')
+        return ERR_HTTP_INVALID_INPUT;
+
+    // Target (path)
+    skipped = read_word(req, i, &res->target);
+    if (skipped <= 0)
+        return ERR_HTTP_INVALID_INPUT;
+    i += skipped;
+
+    // Skip space
+    if (req->data[i++] != ' ')
+        return ERR_HTTP_INVALID_INPUT;
+
+    // Protocol
+    skipped = read_word(req, i, &res->protocol);
+    if (skipped <= 0)
+        return ERR_HTTP_INVALID_INPUT;
+    i += skipped;
+
+    // CRLF (EOL) oh qu'il est casse couilles celui-là
+    ssize_t req_size = req->size; // aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaah
+    if (i < req_size && req->data[i] == '\r')
+        i++;
+    if (i >= req_size || req->data[i] != '\n')
+        return ERR_HTTP_INVALID_INPUT;
+    i++;
+    // Donc 2h de debug pour ça là ? Plutot envie de me tirer une balle si vous
+    // voulez mon avis
+
+    return i;
+}
+
+// Split target into path and queries
+static void split_target(struct http_request *req)
+{
+    size_t i = 0;
+    while (i < req->target->size)
+    {
+        if (req->target->data[i] == '?')
+        {
+            req->queries =
+                string_create(req->target->data + i, req->target->size - i);
+            req->target->size = i;
+            return;
+        }
+        i++;
+    }
+}
+
+// Finds a valid path based on the client input and returns the corresponding
+// FILES return value (see files.h)
+static int find_target(struct http_request *req)
+{
+    // Check filename
+    if (!check_filename(req->target))
+        return ERR_FILES_FORBIDDEN;
+
+    char *target = string_to_charptr(req->target);
+    int err = is_directory(target);
+    free(target);
+
+    if (err == FILES_DIR) // Is a directory
+    {
+        // Append default file if directory
+        if (req->target->data[req->target->size - 1] != '/')
+            string_concat_str(req->target, "/", 1);
+
+        string_concat_str(req->target, config->servers->default_file,
+                          strlen(config->servers->default_file));
+        // Recheck
+        target = string_to_charptr(req->target);
+        err = is_directory(target);
+        free(target);
+        return err;
+    }
+
+    return err;
+}
+
+// WARNING allocates result on the heap
+static char *get_http_method(enum http_method method)
+{
+    char *res = malloc(8 * sizeof(char));
+    switch (method)
+    {
+    case GET:
+        strcpy(res, "HEAD");
+        return res;
+    case HEAD:
+        strcpy(res, "HEAD");
+        return res;
+    default:
+        free(res);
+        return NULL;
+    }
+}
+
+static struct string *generate_status_message(int status_code)
+{
+    char *message;
+    switch (status_code)
+    {
+    case 200:
+        message = "OK";
+        break;
+    case 400:
+        message = "Bad Request";
+        break;
+    case 403:
+        message = "Forbidden";
+        break;
+    case 404:
+        message = "Not Found";
+        break;
+    case 405:
+        message = "Method Not Allowed";
+        break;
+    case 505:
+        message = "HTTP Version Not Supported";
+        break;
+    default:
+        message = "WTF";
+    }
+
+    return string_create(message, strlen(message));
+}
+
+static void check_req(struct http_request *req, struct http_response *resp)
+{
+    // Method
+    if (req->method == INVALID_METHOD)
+        resp->status_code = 405;
+
+    // Protocol
+    // Oui il y a plus beau, mais on a le temps ou on l'a pas, moi je l'ai pas,
+    // alors si t'es pas content t'as qu'à le modifier toi même vu que tu as
+    // visiblement le code source. <3
+    if (string_compare_strictly_n_str(req->protocol, "HTTP/", strlen("HTTP/"))
+        != 0)
+        resp->status_code = 400;
+    else if (string_compare_strictly_n_str(req->protocol, "HTTP/1.1",
+                                           strlen("HTTP/1.1"))
+             != 0)
+        resp->status_code = 505;
+
+    // Host
+    if (resp->status_code != 400 && resp->status_code != 505)
+    {
+        int host_count = 0;
+        struct http_header *cur = req->headers;
+        while (cur != NULL)
+        {
+            if (cur->field->size == 4
+                && string_compare_n_str(cur->field, "host", 4) == 0)
+            {
+                host_count++;
+                if (cur->value == NULL || cur->value->size == 0)
+                {
+                    resp->status_code = 400;
+                    break;
+                }
+            }
+            cur = cur->next;
+        }
+
+        if (host_count != 1)
+            resp->status_code = 400;
+    }
+
+    // printf("%s %d\n", req->protocol->data, resp->status_code);
+}
+
+// === Functions
+
+void http_init(struct config *cfg)
+{
+    config = cfg;
+}
+
+// TODO handle logs
+void handle_request(int client_fd, char *client_ip)
+{
+    char buffer[BUFFER_SIZE]; // Declared in server.h
+    struct string *str = string_create(NULL, 0);
+    if (str == NULL)
+        return;
+
+    // Store request
+    ssize_t nread = 0;
+    // This line here is so hard...
+    // When you realise that you have to remake all your project to be able to
+    // parse requests of BUFFER_SIZE size...
+    // Rendez les bijoux de la couronne (svp)
+    while ((nread = recv(client_fd, buffer, BUFFER_SIZE, 0)) == BUFFER_SIZE)
+    {
+        string_concat_str(str, buffer, nread);
+    }
+    if (nread > 0)
+        string_concat_str(str, buffer, nread);
+
+    // Parse request
+    struct http_request *req = parse_request(str);
+    if (req == NULL)
+    {
+        free(str);
+        return;
+    }
+    char *method = get_http_method(req->method);
+    char *target = string_to_charptr(req->target);
+    print_log_request(method, target, client_ip);
+    free(method);
+    free(target);
+
+    // Generate response
+    struct http_response *resp = generate_response(req);
+    if (resp == NULL)
+    {
+        free(str);
+        free(req);
+        return;
+    }
+
+    // Format response to string
+    struct string *res = format_response(resp);
+    if (res == NULL)
+    {
+        free(str);
+        free(req);
+        return;
+    }
+
+    // Send response
+    ssize_t nsent;
+    size_t total_sent = 0;
+    while (total_sent < res->size)
+    {
+        nsent =
+            send(client_fd, res->data + total_sent, res->size - total_sent, 0);
+        if (nsent <= 0)
+            break;
+        total_sent += nsent;
+    }
+
+    // Send file
+    struct http_header *cl_header = get_header(resp->headers, "Content-Length");
+    if (cl_header != NULL)
+    {
+        char *target = string_to_charptr(req->target);
+        char *cl_str = string_to_charptr(cl_header->value);
+        int fd = open(target, O_RDONLY);
+        if (fd > 0)
+            sendfile(client_fd, fd, 0, atoi(cl_str));
+
+        free(target);
+        free(cl_str);
+    }
+
+    // Log response
+    method = get_http_method(req->method);
+    target = string_to_charptr(req->target);
+    print_log_response(resp->status_code, method, target, client_ip);
+    free(method);
+    free(target);
+
+    // Free
+    string_destroy(str);
+    string_destroy(res);
+    destroy_request(req);
+    destroy_response(resp);
+}
+
+// TODO handle logs and free adequately
+struct http_request *parse_request(struct string *req)
+{
+    struct http_request *res = calloc(1, sizeof(struct http_request));
+    if (res == NULL)
+        return NULL;
+
+    // Status line
+    size_t i = 0;
+    ssize_t nread = parse_reqline(res, req);
+    if (nread <= 0)
+    {
+        if (nread == ERR_HTTP_NOT_IMPLEMENTED)
+            res->status_code = 501;
+        else
+            res->status_code = 400;
+
+        if (res->target == NULL)
+            res->target = string_create("", 0);
+        if (res->protocol == NULL)
+            res->protocol = string_create("HTTP/1.1", 8);
+
+        return res;
+    }
+
+    // Split path and query
+    split_target(res);
+
+    i += nread;
+
+    // Headers
+    nread = parse_headers(res, req, i);
+    if (nread <= 0)
+    {
+        res->status_code = 400;
+        return res;
+    }
+
+    return res;
+}
+
+// TODO handle logs and free adequately
+struct http_response *generate_response(struct http_request *req)
+{
+    // Malloc
+    struct http_response *res = calloc(1, sizeof(struct http_response));
+    if (res == NULL)
+        return NULL;
+
+    // Protocol
+    // char *protocol = HTTP_VERSION;
+    char *protocol = "HTTP/1.1";
+    res->protocol = string_create(protocol, strlen(protocol));
+
+    // Target
+    if (req->status_code == 0)
+    {
+        str_concat_string(config->servers->root_dir,
+                          strlen(config->servers->root_dir), req->target);
+    }
+
+    // Status code
+    if (req->status_code == 0)
+    {
+        switch (find_target(req))
+        {
+        case FILES_REG:
+            res->status_code = 200;
+            break;
+        case ERR_FILES_NOT_FOUND:
+            res->status_code = 404;
+            break;
+        default:
+            res->status_code = 403;
+            break;
+        }
+    }
+    else
+        res->status_code = req->status_code;
+
+    // Check protocol and method
+    if (req->status_code == 0)
+        check_req(req, res);
+
+    // Headers
+    char *time = get_time();
+    append_header(&res->headers, create_header("Date", time));
+    free(time); // Yes, the one that completely disapeared this year
+    if (res->status_code == 200)
+    {
+        char buf[21] = { 0 }; // (20 ~= log10(2^64)) + 1 (null byte)
+        char *target = string_to_charptr(req->target);
+        ssize_t cl = get_file_content_size(target);
+        free(target);
+        if (cl >= 0)
+        {
+            sprintf(buf, "%lu", cl);
+            append_header(&res->headers, create_header("Content-Length", buf));
+        }
+        else
+        {
+            res->status_code = 403;
+        }
+    }
+    else
+    {
+        append_header(&res->headers, create_header("Content-Length", "0"));
+    }
+    append_header(&res->headers, create_header("Connection", "close"));
+
+    // Status msg
+    res->status_msg = generate_status_message(res->status_code);
+
+    return res;
+}
+
+struct string *format_response(struct http_response *resp)
+{
+    // Protocol
+    struct string *res =
+        string_create(resp->protocol->data, resp->protocol->size);
+
+    string_concat_str(res, " ", 1);
+
+    // Status code
+    char buf[4] = { 0 };
+    sprintf(buf, "%d", resp->status_code);
+    string_concat_str(res, buf, strlen(buf));
+
+    string_concat_str(res, " ", 1);
+
+    // Status message
+    char *status_msg = string_to_charptr(resp->status_msg);
+    string_concat_str(res, status_msg, strlen(status_msg));
+    free(status_msg);
+
+    string_concat_str(res, "\r\n", 2);
+
+    // Headers
+    struct http_header *cur_header = resp->headers;
+    while (cur_header != NULL)
+    {
+        string_concat_str(res, cur_header->field->data,
+                          cur_header->field->size);
+
+        string_concat_str(res, ": ", 2);
+
+        string_concat_str(res, cur_header->value->data,
+                          cur_header->value->size);
+
+        string_concat_str(res, "\r\n", 2);
+
+        cur_header = cur_header->next;
+    }
+
+    string_concat_str(res, "\r\n", 2);
+
+    return res;
+}
+
+void destroy_request(struct http_request *req)
+{
+    if (req != NULL)
+    {
+        if (req->target != NULL)
+            string_destroy(req->target);
+        if (req->protocol != NULL)
+            string_destroy(req->protocol);
+
+        destroy_headers(req->headers);
+
+        free(req);
+    }
+}
+
+void destroy_response(struct http_response *resp)
+{
+    if (resp != NULL)
+    {
+        if (resp->status_msg != NULL)
+            string_destroy(resp->status_msg);
+        if (resp->protocol != NULL)
+            string_destroy(resp->protocol);
+
+        destroy_headers(resp->headers);
+
+        free(resp);
+    }
+}

src/http/http.h

@@ -0,0 +1,118 @@
+#ifndef HTTP_H
+#define HTTP_H
+
+// === Definitions
+
+// #define _POSIX_C_SOURCE 200809L
+
+// Error codes
+#define ERR_HTTP_INVALID_INPUT -1
+#define ERR_HTTP_NOT_IMPLEMENTED -2
+#define ERR_HTTP_OUT_OF_MEMORY -4
+#define ERR_HTTP_INTERNAL_ERROR -5
+
+// === Includes
+
+#include "../config/config.h"
+#include "../utils/string/string.h"
+
+// === Enums
+
+enum http_method
+{
+    INVALID_METHOD,
+    GET,
+    // POST,
+    // PUT,
+    // DELETE,
+    // PATCH,
+    HEAD,
+    // OPTIONS,
+    // CONNECT,
+    // TRACE
+};
+
+// === Structures
+
+struct http_header
+{
+    struct string *field;
+    struct string *value;
+    struct http_header *next;
+};
+
+struct http_request
+{
+    enum http_method method;
+    struct string *target;
+    struct string *queries;
+    struct string *protocol;
+    struct http_header *headers; // Headers linked list
+    int status_code; // Set by program
+};
+
+struct http_response
+{
+    struct string *protocol;
+    int status_code;
+    struct string *status_msg;
+    struct http_header *headers; // Headers linked list
+};
+
+// === Functions
+
+/* @brief Initializes the HTTP module with the given configuration
+ *
+ * @warn Do no use any other function of this module before calling that one
+ *
+ * @param cfg
+ */
+void http_init(struct config *cfg);
+
+/* @brief Reads, parses the request and responds adequately all-in-one
+ *
+ * @param client_fd
+ */
+void handle_request(int client_fd, char *client_ip);
+
+/* @brief Parses the HTTP request and splits it into a request structure
+ *
+ * @param req
+ *
+ * @return A pointer to the structure containing the request infos on success,
+ *         NULL otherwise
+ */
+struct http_request *parse_request(struct string *req);
+
+/* @brief Generates a response to the given request
+ *
+ * @param req
+ *
+ * @return A pointer to the generated response struct on success,
+ *         NULL otherwise
+ */
+struct http_response *generate_response(struct http_request *req);
+
+/* @brief Formats the given response structure into a valid HTTP response
+ *        string
+ *
+ * @param resp
+ *
+ * @return A pointer to the string containing the response on success,
+ *         NULL otherwise
+ */
+struct string *format_response(struct http_response *resp);
+
+/* @brief Free all allocated memory inside req and req itself
+ *
+ * @param req
+ */
+void destroy_request(struct http_request *req);
+
+/* @brief Free all allocated memory inside resp and resp itself
+ *
+ * @param resp
+ */
+void destroy_response(struct http_response *resp);
+
+#endif // ! HTTP_H

src/logger/errors.c

@@ -0,0 +1,61 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include "errors.h"
+
+#include <errno.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "../utils/time/fmt_time.h"
+#include "logs.h"
+
+// === Static variable
+
+static struct logs_config config;
+
+// === Functions
+
+void errlog_init(bool enabled, int logfile_fd, struct server_config *serv_cfg)
+{
+    config.enabled = enabled;
+    if (logfile_fd == STDOUT_FILENO)
+        config.logfile_fd = STDERR_FILENO;
+    config.logfile_fd = logfile_fd;
+    config.server_cfg = serv_cfg;
+}
+
+void print_err(void)
+{
+    print_log_err("%s", get_err());
+}
+
+void print_log_err(char *format, ...)
+{
+    if (!config.enabled)
+        return;
+
+    // Log prefix (time and server name)
+    char *time = get_time();
+    dprintf(config.logfile_fd, "%s [%s] ERROR ", time,
+            config.server_cfg->server_name);
+    free(time);
+
+    // Print actual log
+    va_list args;
+    va_start(args, format);
+    vdprintf(config.logfile_fd, format, args);
+    va_end(args);
+
+    // New line
+    dprintf(config.logfile_fd, "\n");
+
+    // Print to stderr
+    fprintf(stderr, "Error: %s", get_err());
+}
+
+char *get_err(void)
+{
+    return strerror(errno);
+}

src/logger/errors.h

@@ -0,0 +1,27 @@
+#ifndef ERRORS_H
+#define ERRORS_H
+
+#include <stdbool.h>
+#include <stdio.h>
+
+#include "../config/config.h"
+
+/* @brief Initialize the error logging submodule
+ * @warning Do not use 'as is', use log_init() instead
+ */
+void errlog_init(bool enabled, int logfile_fd, struct server_config *serv_cfg);
+
+/* @brief Retrieves the last error with errno and prints the corresponding
+ *        error message in the logs and stderr
+ */
+void print_err(void);
+
+/* @brief Prints error logs, just like print_log() but for errors
+ */
+void print_log_err(char *format, ...);
+
+/* @brief Returns the string corresponding to the last error that happened
+ */
+char *get_err(void);
+
+#endif // ! ERRORS_H

src/logger/logs.c

@@ -0,0 +1,79 @@
+#define _POSIX_C_SOURCE 200809L
+
+#include "logs.h"
+
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "../utils/time/fmt_time.h"
+#include "errors.h"
+
+// === Static variables
+
+static struct logs_config config;
+
+// === Functions
+
+int log_init(struct config *global_config)
+{
+    int return_value = 0;
+    config.enabled = global_config->log;
+    config.server_cfg = global_config->servers;
+    if (global_config->log_file != NULL)
+    {
+        config.logfile_fd = open(global_config->log_file, O_WRONLY);
+        if (config.logfile_fd <= 0)
+        {
+            config.enabled = false;
+            return_value = 1;
+        }
+    }
+    else
+    {
+        config.logfile_fd = STDOUT_FILENO;
+    }
+
+    errlog_init(config.enabled, config.logfile_fd, config.server_cfg);
+    return return_value;
+}
+
+void print_log(char *format, ...)
+{
+    if (!config.enabled)
+        return;
+
+    // Log prefix (time and server name)
+    char *time = get_time();
+    dprintf(config.logfile_fd, "%s [%s] ", time,
+            config.server_cfg->server_name);
+    free(time);
+
+    // Print actual log
+    va_list args;
+    va_start(args, format);
+    vdprintf(config.logfile_fd, format, args);
+    va_end(args);
+
+    // New line
+    dprintf(config.logfile_fd, "\n");
+}
+
+void print_log_request(char *request_type, char *target, char *client_ip)
+{
+    print_log("received %s, on '%s' from %s", request_type, target, client_ip);
+}
+
+void print_log_response(int status_code, char *request_type, char *target,
+                        char *client_ip)
+{
+    print_log("responding with %d to %s for %s on '%s'", status_code, client_ip,
+              request_type, target);
+}
+
+void log_terminate(void)
+{
+    if (config.logfile_fd != 0 && config.logfile_fd != STDOUT_FILENO)
+        close(config.logfile_fd);
+}

src/logger/logs.h

@@ -0,0 +1,54 @@
+#ifndef LOGS_H
+#define LOGS_H
+
+#include <stdio.h>
+
+#include "../config/config.h"
+
+struct logs_config
+{
+    bool enabled;
+    int logfile_fd;
+    struct server_config *server_cfg;
+};
+
+/* @brief Initializes the logging module
+ *
+ * @param config
+ *
+ * @return 0 on success, an error code otherwise
+ */
+int log_init(struct config *config);
+
+/* @brief Prints logs (or not) conformly to the config given by the user.
+ *        Works like printf (because it uses it under the hood) with a
+ *        formatted string and variadic arguments.
+ *
+ * @param format
+ * @param ...
+ */
+void print_log(char *format, ...);
+
+/* @brief Prints request logs with the adequate format in the logfile
+ *
+ * @param request_type
+ * @param target
+ * @param client_ip
+ */
+void print_log_request(char *request_type, char *target, char *client_ip);
+
+/* @brief Prints response logs with the adequate format in the logfile
+ *
+ * @param status_code
+ * @param request_type
+ * @param target
+ * @param client_ip
+ */
+void print_log_response(int status_code, char *request_type, char *target,
+                        char *client_ip);
+
+/* @brief Gracefully exits the logs module
+ */
+void log_terminate(void);
+
+#endif // ! LOGS_H

src/main.c

@@ -0,0 +1,48 @@
+#include <getopt.h>
+
+#include "config/config.h"
+#include "daemon/daemon.h"
+#include "http/http.h"
+#include "logger/logs.h"
+#include "server/server.h"
+
+#define ERR_ARG 2
+
+int main(int argc, char **argv)
+{
+    // Parse config
+    struct config *config = parse_configuration(argc, argv);
+    if (config == NULL)
+        return ERR_ARG;
+
+    // Initialize modules
+    log_init(config); // Ignore ret val
+    http_init(config);
+    daemon_init(config);
+
+    // Start server
+    switch (config->daemon)
+    {
+    case NO_OPTION:
+        start_server(config);
+        break;
+
+    case START:
+        start_daemon();
+        break;
+
+    case RESTART:
+        restart_daemon();
+        break;
+
+    case STOP:
+        stop_daemon();
+        break;
+
+    default:
+        return 2;
+    }
+
+    config_destroy(config);
+    return 0;
+}

src/server/server.c

@@ -0,0 +1,184 @@
+// === Definitions
+
+#define _POSIX_C_SOURCE 200112L
+
+#define BUFFER_SIZE 1024
+
+// === Includes
+#include "server.h"
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include "../http/http.h"
+#include "../logger/errors.h"
+#include "../logger/logs.h"
+// #include "../logger/logs.h"
+
+// === Static variables
+
+static int server_socket = 0;
+static struct config *config;
+
+// === Static functions
+
+// Creates and bind the server communication socket
+static int get_socket(const char *hostname, const char *port)
+{
+    // set lower-level protocols infos
+    struct addrinfo hints = { 0 };
+    hints.ai_family = AF_INET; // IPv4
+    hints.ai_socktype = SOCK_STREAM; // Socket type (necessary for TCP)
+    hints.ai_protocol = IPPROTO_TCP; // TCP
+
+    // Retrieve node informations
+    struct addrinfo *client_addr = NULL; // Client addresses list
+    int err = getaddrinfo(hostname, port, &hints, &client_addr);
+    if (err != 0)
+    {
+        print_err();
+        return -1;
+    }
+
+    // Try each address
+    int sock_fd;
+    bool socket_bound = false;
+    struct addrinfo *cur_addr = client_addr;
+    while (cur_addr != NULL && !socket_bound)
+    {
+        // Create socket
+        sock_fd = socket(cur_addr->ai_family, cur_addr->ai_socktype,
+                         cur_addr->ai_protocol);
+        if (sock_fd == -1)
+        {
+            cur_addr = cur_addr->ai_next;
+            continue;
+        }
+
+        // ... Has something to do with not changing port
+        int sock_opt = -1;
+        setsockopt(sock_fd, SOL_SOCKET, SO_REUSEADDR, &sock_opt,
+                   sizeof(sock_opt));
+
+        // Assign name to socket (bind)
+        err = bind(sock_fd, cur_addr->ai_addr, cur_addr->ai_addrlen);
+        if (err != -1)
+            socket_bound = true;
+        else
+            close(sock_fd);
+
+        cur_addr = cur_addr->ai_next;
+    }
+
+    freeaddrinfo(client_addr);
+    return sock_fd;
+}
+
+// Reads and sends back received data to client
+// For testing purposes
+// static void send_back(int client_fd)
+// {
+//     ssize_t nread = 0;
+//     char buffer[BUFFER_SIZE];
+
+//     while ((nread = recv(client_fd, buffer, BUFFER_SIZE, 0)) > 0)
+//     {
+//         ssize_t sent;
+//         while (nread > 0)
+//         {
+//             sent = send(client_fd, buffer, nread, 0);
+//             if (sent == -1) // Send failed
+//                 break;
+
+//             nread -= sent;
+//         }
+//     }
+// }
+
+// Retrieves client ipv4 address and stores it in res
+// WARNING: res must be of size INET_ADDRSTRLEN
+static void get_ip(struct sockaddr *client_addr, char *res)
+{
+    // NOTE: exceptionally authorized cast
+    struct in_addr ipAddr = ((struct sockaddr_in *)client_addr)->sin_addr;
+    inet_ntop(AF_INET, &ipAddr, res, INET_ADDRSTRLEN);
+}
+
+static void signal_handler(int signal)
+{
+    print_log("EVENT Signal received: %d", signal);
+    switch (signal)
+    {
+    case SIGINT: {
+        print_log("STOPPING Stopping server...");
+        stop_server();
+        config_destroy(config);
+        exit(0);
+    }
+    default:
+        return;
+    }
+}
+
+// === Functions
+
+void start_server(struct config *cfg)
+{
+    config = cfg;
+    const char *host = config->servers->ip;
+    const char *port = config->servers->port;
+
+    server_socket = get_socket(host, port);
+    if (server_socket == -1)
+        // TODO log that
+        return;
+
+    int err = listen(server_socket, SOMAXCONN);
+    if (err == -1)
+        return;
+
+    // Signal handling
+    struct sigaction siga;
+    siga.sa_flags = 0;
+    siga.sa_handler = signal_handler;
+    // initialize mask
+    if (sigemptyset(&siga.sa_mask) < 0)
+        // TODO log that
+        return;
+    if (sigaction(SIGINT, &siga, NULL) == -1
+        || sigaction(SIGPIPE, &siga, NULL) == -1)
+        return;
+
+    // Main loop
+    while (1)
+    {
+        struct sockaddr client_addr;
+        socklen_t client_addr_len = sizeof(struct sockaddr);
+        int client_fd = accept(server_socket, &client_addr, &client_addr_len);
+        if (client_fd == -1)
+            continue;
+
+        // TODO handle signals to stop
+
+        // Get ip
+        char client_ip[INET_ADDRSTRLEN];
+        get_ip(&client_addr, client_ip);
+
+        handle_request(client_fd, client_ip);
+        // send_back(client_fd);
+        close(client_fd);
+    }
+
+    stop_server();
+}
+
+void stop_server(void)
+{
+    close(server_socket);
+}

src/server/server.h

@@ -0,0 +1,19 @@
+#ifndef SERVER_H
+#define SERVER_H
+
+#include "../config/config.h"
+
+/* @brief Starts the HTTP server
+ *
+ * @warn Make sure to initialize modules before calling
+ *
+ * @param hostname
+ * @param port
+ */
+void start_server(struct config *cfg);
+
+/* @brief Stops the currently running HTTP server
+ */
+void stop_server(void);
+
+#endif // ! SERVER_H

src/utils/files/files.c

@@ -0,0 +1,105 @@
+#define _POSIX_C_SOURCE 200112L
+
+#include "files.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
+// #include "../string/string.h"
+
+// int file_exists(const char *path)
+// {}
+
+int is_directory(const char *path)
+{
+    struct stat path_stat;
+    if (lstat(path, &path_stat) == 0)
+    {
+        if (S_ISDIR(path_stat.st_mode)) // Directory
+            return FILES_DIR;
+        else if (S_ISREG(path_stat.st_mode)) // Regular file
+            return FILES_REG;
+        else
+            return FILES_OTHER;
+    }
+    else
+    {
+        if (errno == ENOENT) // File not found
+            return ERR_FILES_NOT_FOUND;
+        else // Other errors
+            return ERR_FILES_FORBIDDEN;
+    }
+}
+
+// TODO handle logging
+// struct string *get_file_content(const char *path)
+// {
+//     // Open file
+//     FILE *stream = fopen(path, "r");
+//     if (stream == NULL)
+//         return NULL;
+
+//     // Alloc result
+//     char buf[BUFFER_SIZE];
+//     struct string *res = string_create(NULL, 0);
+//     if (res == NULL)
+//     {
+//         return NULL;
+//     }
+
+//     int nread;
+//     while ((fgets(buf, BUFFER_SIZE, stream)))
+// }
+
+// TODO not implemented
+bool check_filename(struct string *path)
+{
+    if (path == NULL || path->size <= 0)
+        return false;
+
+    return true;
+}
+
+ssize_t get_file_content_size(const char *path)
+{
+    FILE *stream = fopen(path, "r");
+    if (stream == NULL)
+        return -2;
+
+    fseek(stream, 0, SEEK_END);
+    ssize_t res = ftell(stream);
+    fclose(stream);
+
+    return res;
+}
+
+int write_to_file(const char *path, struct string *buf)
+{
+    FILE *stream = fopen(path, "w");
+    if (stream == NULL)
+        return 1;
+
+    fwrite(buf->data, sizeof(char), buf->size, stream);
+
+    fclose(stream);
+
+    return 0;
+}
+
+int write_pid(const char *filepath, int pid)
+{
+    FILE *stream = fopen(filepath, "w");
+    if (stream == NULL)
+        return 1;
+
+    if (fprintf(stream, "%d", pid) <= 0)
+    {
+        fclose(stream);
+        return 1;
+    }
+
+    fclose(stream);
+
+    return 0;
+}

src/utils/files/files.h

@@ -0,0 +1,109 @@
+#ifndef FILES_H
+#define FILES_H
+
+// === Definitions
+
+#define BUFFER_SIZE 1024
+
+// Return codes
+#define FILES_REG 0
+#define FILES_DIR 1
+#define FILES_OTHER 8
+
+// Errors
+#define ERR_FILES_NOT_FOUND -1
+#define ERR_FILES_FORBIDDEN -2
+
+// === Includes
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+#include "../string/string.h"
+
+// === Functions
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return
+ */
+// bool file_exists(const char *path);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return Returns the corresponding return value / error code (see header
+ * definitions)
+ */
+int is_directory(const char *path);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return
+ */
+// char *get_file(const char *path);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return
+ */
+struct string *get_file_content(const char *path);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return
+ */
+bool check_filename(struct string *path);
+
+/*
+ * @brief
+ *
+ * @param filename
+ *
+ * @return
+ */
+// bool sanitize_filename(struct string *filename);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return
+ */
+ssize_t get_file_content_size(const char *path);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return 0 on success, the corresponding error code otherwise
+ */
+int write_to_file(const char *path, struct string *buf);
+
+/*
+ * @brief
+ *
+ * @param path
+ *
+ * @return 0 on success, the corresponding error code otherwise
+ */
+int write_pid(const char *filepath, int pid);
+
+#endif // ! FILES_H

src/utils/parsing/blanks.c

@@ -0,0 +1,46 @@
+#include "blanks.h"
+
+bool is_space(char c)
+{
+    switch (c)
+    {
+    case ' ':
+    case '\t':
+        return true;
+
+    default:
+        return false;
+    }
+}
+
+bool is_blank(char c)
+{
+    switch (c)
+    {
+    case '\f':
+    case '\n':
+    case '\r':
+    case '\t':
+    case '\v':
+    case ' ':
+        return true;
+
+    default:
+        return false;
+    }
+}
+
+ssize_t skip_blanks(struct string *str, size_t offset)
+{
+    size_t i = offset;
+    while (i < str->size)
+    {
+        if (!is_space(str->data[i]))
+            return i;
+
+        i++;
+    }
+
+    // Reached EOL
+    return i;
+}

src/utils/parsing/blanks.h

@@ -0,0 +1,39 @@
+#ifndef BLANKS_H
+#define BLANKS_H
+
+// === Definitions
+
+#define BLANKS_LIST "\f\n\r\t\v "
+
+// === Includes
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+#include "../string/string.h"
+
+// === Functions
+/*
+ * NOTE:
+ * As ispace(3) and isblank(3) functions from stdlib can be confusing and not
+ * always best suited for what I want to do, I decided to reimplement them.
+ * So be warned, they won't have the same behavior as their libc counterparts.
+ */
+
+/*
+ * Doc: TODO
+ */
+bool is_space(char c);
+
+/*
+ * Doc: TODO
+ */
+bool is_blank(char c);
+
+/*
+ * Doc: TODO
+ */
+ssize_t skip_blanks(struct string *str, size_t offset);
+
+#endif // ! BLANKS_H

src/utils/parsing/words.c

@@ -0,0 +1,107 @@
+#include "words.h"
+
+#include "blanks.h"
+
+bool str_contains(const char *str, char c)
+{
+    int i = 0;
+    while (str[i] != '\0')
+    {
+        if (str[i] == c)
+            return true;
+
+        i++;
+    }
+
+    return false;
+}
+
+ssize_t read_word(struct string *str, size_t offset, struct string **res)
+{
+    size_t i = offset;
+    while (i < str->size)
+    {
+        if (is_blank(str->data[i]))
+            break;
+
+        i++;
+    }
+
+    *res = string_create(str->data + offset, i - offset);
+    if (res == NULL)
+        return -1;
+
+    return i - offset;
+}
+
+ssize_t read_word_delim(struct string *str, size_t offset, struct string **res,
+                        const char *delims)
+{
+    size_t i = offset;
+    bool found = false;
+
+    while (i < str->size && !found)
+    {
+        if (str_contains(delims, str->data[i]))
+        {
+            found = true;
+            break;
+        }
+
+        i++;
+    }
+
+    *res = string_create(str->data + offset, i - offset);
+    if (res == NULL)
+        return -1;
+
+    return i - offset;
+}
+
+ssize_t read_word_restrict(struct string *str, size_t offset,
+                           struct string **res, const char *restr)
+{
+    size_t i = offset;
+    bool found = false;
+
+    while (i < str->size && !found)
+    {
+        if (!str_contains(restr, str->data[i]))
+        {
+            found = true;
+            break;
+        }
+
+        i++;
+    }
+
+    *res = string_create(str->data + offset, i - offset);
+    if (res == NULL)
+        return -1;
+
+    return i - offset;
+}
+
+ssize_t read_word_predicate(struct string *str, size_t offset,
+                            struct string **res, bool (*predicate)(char c))
+{
+    size_t i = offset;
+    bool found = false;
+
+    while (i < str->size && !found)
+    {
+        if (predicate(str->data[i]))
+        {
+            found = true;
+            break;
+        }
+
+        i++;
+    }
+
+    *res = string_create(str->data + offset, i - offset);
+    if (res == NULL)
+        return -1;
+
+    return i - offset;
+}

src/utils/parsing/words.h

@@ -0,0 +1,42 @@
+#ifndef WORDS_H
+#define WORDS_H
+
+// === Includes
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <sys/types.h>
+
+#include "../string/string.h"
+
+// === Functions
+
+/*
+ * Doc: TODO
+ */
+bool str_contains(const char *str, char c);
+
+/*
+ * Doc: TODO
+ */
+ssize_t read_word(struct string *str, size_t offset, struct string **res);
+
+/*
+ * Doc: TODO
+ */
+ssize_t read_word_delim(struct string *str, size_t offset, struct string **res,
+                        const char *delims);
+
+/*
+ * Doc: TODO
+ */
+ssize_t read_word_restrict(struct string *str, size_t offset,
+                           struct string **res, const char *restr);
+
+/*
+ * Doc: TODO
+ */
+ssize_t read_word_predicate(struct string *str, size_t offset,
+                            struct string **res, bool (*predicate)(char c));
+
+#endif // ! WORDS_H

src/utils/string/string.c

@@ -0,0 +1,175 @@
+#include "string.h"
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+struct string *string_create(const char *str, size_t size)
+{
+    struct string *res = calloc(1, sizeof(struct string));
+    if (res == NULL)
+        return NULL;
+
+    if (size > 0)
+    {
+        res->data = malloc(size * sizeof(char));
+        if (res->data == NULL)
+        {
+            free(res);
+            return NULL;
+        }
+
+        memcpy(res->data, str, size);
+    }
+
+    res->size = size;
+    return res;
+}
+
+int string_compare_n_str(const struct string *str1, const char *str2, size_t n)
+{
+    size_t i = 0;
+    int res = 0;
+    char reached_str2_end = 0;
+    while (i < n)
+    {
+        if (i < str1->size)
+            res += str1->data[i];
+
+        if (!reached_str2_end)
+        {
+            if (str2[i] == '\0')
+                reached_str2_end = 1;
+            else
+                res -= str2[i];
+        }
+
+        i++;
+    }
+
+    return res;
+}
+
+void string_concat_str(struct string *str, const char *to_concat, size_t size)
+{
+    size_t new_size = str->size + size;
+    size_t str_size = str->size;
+
+    if (new_size == 0)
+        return;
+
+    str->size = new_size;
+    if (str_size == 0)
+    {
+        str->data = malloc(new_size);
+        if (str->data == NULL)
+            return; // Handle ?
+    }
+    else
+    {
+        str->data = realloc(str->data, new_size * sizeof(char));
+        if (str->data == NULL)
+            return; // Handle ?
+    }
+
+    for (size_t i = 0; i < size; i++)
+    {
+        str->data[str_size + i] = to_concat[i];
+    }
+}
+
+void str_concat_string(const char *str, size_t size, struct string *to_concat)
+{
+    size_t new_size = to_concat->size + size;
+    size_t tmp_size = to_concat->size;
+
+    if (new_size == 0)
+        return;
+
+    to_concat->size = new_size;
+    if (tmp_size == 0)
+    {
+        to_concat->data = malloc(new_size);
+        if (to_concat->data == NULL)
+            return; // Handle ?
+    }
+    else
+    {
+        // Temporary buffer
+        char *tmp = malloc(tmp_size * sizeof(char));
+        if (tmp == NULL)
+            return; // Handle ?
+
+        // (Duplicate)
+        memcpy(tmp, to_concat->data, tmp_size);
+
+        // Reallocate string
+        char *new_data = realloc(to_concat->data, new_size * sizeof(char));
+        if (to_concat->data == NULL)
+        {
+            to_concat->size = tmp_size; // Restore (original ptr still valid)
+            return; // Handle ?
+        }
+        to_concat->data = new_data;
+
+        memcpy(to_concat->data, str, size);
+        memcpy(to_concat->data + size, tmp, tmp_size);
+        free(tmp);
+    }
+}
+
+void string_to_lowercase(struct string *str)
+{
+    for (size_t i = 0; i < str->size; i++)
+    {
+        if (isupper(str->data[i]))
+            str->data[i] += 'a' - 'A';
+    }
+}
+
+void string_destroy(struct string *str)
+{
+    if (str != NULL)
+    {
+        if (str->data != NULL)
+        {
+            free(str->data);
+        }
+        free(str);
+    }
+}
+
+char *string_to_charptr(struct string *str)
+{
+    if (str == NULL || str->data == NULL)
+        return NULL;
+
+    char *res = calloc(str->size + 1, sizeof(char));
+    if (res == NULL)
+        return NULL;
+
+    memcpy(res, str->data, str->size);
+
+    res[str->size] = '\0';
+
+    return res;
+}
+
+// WARNING takes n as valid, will not stop on '\0'
+int string_compare_strictly_n_str(const struct string *str1, const char *str2,
+                                  size_t n)
+{
+    if (str1->size < n)
+        return -1;
+
+    size_t i = 0;
+    int res = 0;
+    while (i < n)
+    {
+        res += str1->data[i];
+        res -= str2[i];
+        i++;
+    }
+
+    return res;
+}

src/utils/string/string.h

@@ -42,6 +42,48 @@ int string_compare_n_str(const struct string *str1, const char *str2, size_t n);
  */
 void string_concat_str(struct string *str, const char *to_concat, size_t size);
 
+/*
+ ** @brief Similar to string_concat_str but with str at the beginning of the
+ * result string
+ **
+ ** @param str
+ ** @param to_concat
+ ** @param size
+ */
+void str_concat_string(const char *str, size_t size, struct string *to_concat);
+
+/*
+ ** @brief Concat a char * with its size in a struct string
+ **
+ ** @param str
+ */
+void string_to_lowercase(struct string *str);
+
+/*
+ ** @brief Free all string content
+ **
+ ** @param str
+ */
 void string_destroy(struct string *str);
 
+/*
+ ** @brief Converts the string to the native C implementation
+ **
+ ** @param str
+ **
+ ** @return a pointer to an allocated memory zone containing the string
+ */
+char *string_to_charptr(struct string *str);
+
+/*
+ ** @brief TODO
+ **
+ ** @param str1
+ ** @param str2
+ ** @param n
+ **
+ ** @return
+ */
+int string_compare_strictly_n_str(const struct string *str1, const char *str2,
+                                  size_t n);
 #endif /* ! STRING_H */

src/utils/time/fmt_time.c

@@ -0,0 +1,15 @@
+#include "fmt_time.h"
+
+#include <stdlib.h>
+#include <time.h>
+
+char *get_time(void)
+{
+    char *buf = malloc(64 * sizeof(char)); // Oui, 64
+    time_t local_ts = time(NULL);
+    struct tm *gmt_time = gmtime(&local_ts);
+
+    // return asctime(gmt_time);
+    strftime(buf, 64, "%a, %d %b %Y %H:%M:%S %Z", gmt_time);
+    return buf;
+}

src/utils/time/fmt_time.h

@@ -0,0 +1,11 @@
+#ifndef FMT_TIME_H
+#define FMT_TIME_H
+
+/* @brief Calculates the GMT time based on machine's local time
+ *        and returns it as a string
+ *
+ * @return A NULL-terminated string containing the fromatted GMT time
+ */
+char *get_time();
+
+#endif // ! FMT_TIME_H

tests/config.txt

@@ -1,9 +1,11 @@
 [global]
 log = true
 pid_file = /tmp/HTTPd.pid
+daemon = start
 
 [[vhosts]]
 server_name = my_server
 ip = 127.0.0.1
 port = 6996
 root_dir = .
+default_file='/dev/null'

tests/test_root_dir/index.html

@@ -0,0 +1 @@
+<h1> YEAAH </h1>

tests/test_suite.py

@@ -0,0 +1,178 @@
+import subprocess as sp
+import http
+import requests
+import socket
+import pytest
+import time
+
+host = "127.0.0.1"
+port = "6994"
+
+executable = "./httpd"
+
+def spawn_httpd(stdout_filename, args=[]):
+    with open(stdout_filename,"w") as f:
+        httpd_proc = sp.Popen([executable,"--pid_file","/tmp/HTTPd.pid","--ip",host,"--port", port, "--root_dir","test_root_dir/","--server_name","httpd"] if args == [] else [executable] + args, stdout=f,stderr=sp.PIPE,bufsize=0)
+    time.sleep(0.2)
+
+    return httpd_proc
+
+def kill_httpd(proc):
+    #proc.send_signal(sp.SIGINT)
+    proc.kill()
+
+# @pytest.mark.timeout(2)
+def test_bad_config():
+    proc = spawn_httpd("out.log", ["hello","world"])
+    proc.wait(1)
+    try:
+        assert proc.returncode == 2
+    finally:
+        kill_httpd(proc)
+
+# @pytest.mark.timeout(2)
+def test_get_index():
+    proc = spawn_httpd("out.log")
+    req = requests.get(f"http://{host}:{port}/index.html")
+    assert req.status_code == 200
+    with open("./test_root_dir/index.html","r") as f:
+        try:
+            assert f.read() == req.text
+        finally:
+            kill_httpd(proc)
+
+# @pytest.mark.timeout(2)
+def test_get_default():
+    proc = spawn_httpd("out.log")
+    req = requests.get(f"http://{host}:{port}/")
+    assert req.status_code == 200
+    with open("./test_root_dir/index.html","r") as f:
+        try:
+            assert f.read() == req.text
+        finally:
+            kill_httpd(proc)
+
+# @pytest.mark.timeout(2)
+def test_no_file():
+    proc = spawn_httpd("out.log")
+    req = requests.get(f"http://{host}:{port}/notindex.html")
+    assert req.status_code == 404
+
+# @pytest.mark.timeout(2)
+def test_bad_request():
+    proc = spawn_httpd("out.log")
+    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+    sock.connect((host,int(port)))
+
+    request = f"GET /index.html FTP/1.1\r\nHOST: {host}:{port}\r\nConnection: close\r\n\r\n"
+    
+    sock.sendall(request.encode())
+
+    resp = sock.recv(1024)
+    resp_decoded = resp.decode()
+
+    try:
+        assert "400 Bad Request" in resp_decoded
+    finally:
+        kill_httpd(proc)
+
+# @pytest.mark.timeout(2)
+def test_invalid_method():
+    proc = spawn_httpd("out.log")
+    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+    sock.connect((host,int(port)))
+
+    request = f"PUT /index.html HTTP/1.1\r\nHOST: {host}:{port}\r\nConnection: close\r\n\r\n"
+    
+    sock.sendall(request.encode())
+
+    response = http.client.HTTPResponse(sock)
+    response.begin()
+
+    try:
+        assert response.status == 405
+    finally:
+        kill_httpd(proc)
+
+
+# @pytest.mark.timeout(2)
+def test_invalid_version():
+    proc = spawn_httpd("out.log")
+    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+    sock.connect((host,int(port)))
+
+    request = f"GET /index.html HTTP/1.2\r\nHOST: {host}:{port}\r\nConnection: close\r\n\r\n"
+    
+    sock.sendall(request.encode())
+
+    response = http.client.HTTPResponse(sock)
+    response.begin()
+
+    try:
+        assert response.status == 505
+    finally:
+        kill_httpd(proc)
+
+# @pytest.mark.timeout(2)
+def test_bad_request():
+    proc = spawn_httpd("out.log")
+    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+    sock.connect((host,int(port)))
+
+    request = f"GET /index.html FTP/1.1\r\nHOST: {host}:{port}\r\nConnection: close\r\n\r\n"
+    
+    sock.sendall(request.encode())
+
+    response = http.client.HTTPResponse(sock)
+    response.begin()
+
+    try:
+        assert response.status == 400
+    finally:
+        kill_httpd(proc)
+
+@pytest.mark.timeout(2)
+def test_head_index():
+    proc = spawn_httpd("out.log")
+    try:
+        req = requests.head(f"http://{host}:{port}/index.html")
+        assert req.status_code == 200
+        assert req.text == ""
+    finally:
+        kill_httpd(proc)
+
+@pytest.mark.timeout(2)
+def test_missing_host():
+    proc = spawn_httpd("out.log")
+    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+    sock.connect((host,int(port)))
+
+    request = f"GET /index.html HTTP/1.1\r\nConnection: close\r\n\r\n"
+    
+    sock.sendall(request.encode())
+
+    response = http.client.HTTPResponse(sock)
+    response.begin()
+
+    try:
+        assert response.status == 400
+    finally:
+        kill_httpd(proc)
+
+@pytest.mark.timeout(2)
+def test_directory_traversal():
+    proc = spawn_httpd("out.log")
+    sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)
+    sock.connect((host,int(port)))
+
+    request = f"GET /../test_suite.py HTTP/1.1\r\nHOST: {host}:{port}\r\nConnection: close\r\n\r\n"
+    
+    sock.sendall(request.encode())
+
+    response = http.client.HTTPResponse(sock)
+    response.begin()
+
+    try:
+        assert response.status in [400, 403, 404]
+    finally:
+        kill_httpd(proc)

tests/tests_mieux.sh

@@ -0,0 +1,40 @@
+#!/bin/sh
+
+# Simple test script for HTTP/1.1 Host header compliance
+# Usage: ./test_host_compliance.sh [IP] [PORT]
+
+IP=${1:-"127.0.0.1"}
+PORT=${2:-"6996"}
+
+echo "Targeting server at $IP:$PORT"
+
+test_req() {
+    NAME="$1"
+    PAYLOAD="$2"
+    EXPECTED="$3"
+
+    echo -n "Test: $NAME ... "
+    # Send payload, wait max 1s for response
+    RESP=$(printf "$PAYLOAD" | nc -w 1 $IP $PORT 2>/dev/null | head -n 1)
+    
+    if echo "$RESP" | grep -q "$EXPECTED"; then
+        echo "PASS"
+    else
+        echo "FAIL (Expected '$EXPECTED', got '$RESP')"
+    fi
+}
+
+# 1. Valid Request
+test_req "Valid Request" "GET / HTTP/1.1\r\nHost: localhost\r\n\r\n" "200 OK"
+
+# 2. Missing Host Header
+test_req "Missing Host" "GET / HTTP/1.1\r\n\r\n" "400 Bad Request"
+
+# 3. Empty Host Header
+test_req "Empty Host" "GET / HTTP/1.1\r\nHost:\r\n\r\n" "400 Bad Request"
+
+# 4. Multiple Host Headers
+test_req "Multiple Hosts" "GET / HTTP/1.1\r\nHost: a\r\nHost: b\r\n\r\n" "400 Bad Request"
+
+# 5. Bad Protocol Version (Should be 505 now with the fix)
+test_req "Bad Protocol (HTTP/1.0)" "GET / HTTP/1.0\r\nHost: localhost\r\n\r\n" "505"