runserver: reimplemented http server without libevent

yeah, this patch implements a "complete" http server for static files.
It is not the best code possible, and would be easily DDoS'able if used
in production, as it spawns a thread for each request, without limiting.

I'm sickish and this is the best code I can deliver now. At least it
works! ;)

7 files changed, 572 insertions, 314 deletions

diff --git a/src/blogc-runserver/httpd-utils.c b/src/blogc-runserver/httpd-utils.c
new file mode 100644
index 0000000..e935668
--- /dev/null
+++ b/src/blogc-runserver/httpd-utils.c
@@ -0,0 +1,100 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+#include "../common/utils.h"
+#include "httpd-utils.h"
+
+
+char*
+br_readline(int socket)
+{
+    bc_string_t *rv = bc_string_new();
+    char buffer[READLINE_BUFFER_SIZE];
+    ssize_t len;
+
+    while ((len = read(socket, buffer, READLINE_BUFFER_SIZE)) != -1) {
+        for (ssize_t i = 0; i < len; i++) {
+            if (buffer[i] == '\r' || buffer[i] == '\n')
+                goto end;
+            bc_string_append_c(rv, buffer[i]);
+        }
+    }
+
+end:
+    return bc_string_free(rv, false);
+}
+
+
+int
+br_hextoi(const char c)
+{
+    if (c >= '0' && c <= '9')
+        return c - '0';
+    if (c >= 'a' && c <= 'f')
+        return c - 'a' + 10;
+    if (c >= 'A' && c <= 'F')
+        return c - 'A' + 10;
+    return -1;
+}
+
+
+char*
+br_urldecode(const char *str)
+{
+    bc_string_t *rv = bc_string_new();
+
+    for (size_t i = 0; i < strlen(str); i++) {
+        switch (str[i]) {
+            case '%':
+                if (i + 2 < strlen(str)) {
+                    int p1 = br_hextoi(str[i + 1]) * 16;
+                    int p2 = br_hextoi(str[i + 2]);
+                    if (p1 >= 0 && p2 >= 0) {
+                        bc_string_append_c(rv, p1 + p2);
+                        i += 2;
+                        continue;
+                    }
+                }
+                bc_string_append_c(rv, '%');
+                break;
+            case '+':
+                bc_string_append_c(rv, ' ');
+                break;
+            default:
+                bc_string_append_c(rv, str[i]);
+        }
+    }
+
+    return bc_string_free(rv, false);
+}
+
+
+const char*
+br_get_extension(const char *filename)
+{
+    const char *ext = NULL;
+    unsigned int i;
+    for (i = strlen(filename); i > 0; i--) {
+        if (filename[i] == '.') {
+            ext = filename + i + 1;
+            break;
+        }
+        if ((filename[i] == '/') || (filename[i] == '\\'))
+            return NULL;
+    }
+    if (i == 0)
+        return NULL;
+    return ext;
+}
diff --git a/src/blogc-runserver/httpd-utils.h b/src/blogc-runserver/httpd-utils.h
new file mode 100644
index 0000000..b9af852
--- /dev/null
+++ b/src/blogc-runserver/httpd-utils.h
@@ -0,0 +1,19 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifndef _HTTPD_UTILS_H
+#define _HTTPD_UTILS_H
+
+#define READLINE_BUFFER_SIZE 1024
+
+char* br_readline(int socket);
+int br_hextoi(const char c);
+char* br_urldecode(const char *str);
+const char* br_get_extension(const char *filename);
+
+#endif /* _HTTPD_UTILS_H */
diff --git a/src/blogc-runserver/httpd.c b/src/blogc-runserver/httpd.c
new file mode 100644
index 0000000..c659580
--- /dev/null
+++ b/src/blogc-runserver/httpd.c
@@ -0,0 +1,254 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <pthread.h>
+#include "../common/error.h"
+#include "../common/file.h"
+#include "../common/utils.h"
+#include "mime.h"
+#include "httpd-utils.h"
+
+#define LISTEN_BACKLOG 100
+
+
+static void
+error(int socket, int status_code, const char *error)
+{
+    char *str = bc_strdup_printf(
+        "HTTP/1.0 %d %s\r\n"
+        "Content-Type: text/html\r\n"
+        "Connection: close\r\n"
+        "\r\n"
+        "<h1>%s</h1>\n", status_code, error, error);
+    write(socket, str, strlen(str));
+    free(str);
+}
+
+
+typedef struct {
+    int socket;
+    const char *docroot;
+} request_data_t;
+
+
+static void*
+handle_request(void *arg)
+{
+    request_data_t *req = arg;
+    int client_socket = req->socket;
+    const char *docroot = req->docroot;
+    free(arg);
+
+    char *conn_line = br_readline(client_socket);
+    char **pieces = bc_str_split(conn_line, ' ', 3);
+    if (bc_strv_length(pieces) != 3) {
+        error(client_socket, 400, "Bad Request");
+        goto point1;
+    }
+
+    if (strcmp(pieces[0], "GET") != 0) {
+        error(client_socket, 405, "Method Not Allowed");
+        goto point1;
+    }
+
+    char **pieces2 = bc_str_split(pieces[1], '?', 2);
+    char *path = br_urldecode(pieces2[0]);
+    bc_strv_free(pieces2);
+
+    if (path == NULL) {
+        error(client_socket, 400, "Bad Request");
+        goto point1;
+    }
+
+    char *abs_path = bc_strdup_printf("%s/%s", docroot, path);
+    char *real_path = realpath(abs_path, NULL);
+    free(abs_path);
+
+    if (real_path == NULL) {
+        error(client_socket, 404, "Not Found");
+        goto point1;
+    }
+
+    char *real_root = realpath(docroot, NULL);
+    if (real_root == NULL) {
+        error(client_socket, 500, "Internal Server Error");
+        goto point2;
+    }
+
+    if (0 != strncmp(real_root, real_path, strlen(real_root))) {
+        error(client_socket, 404, "Not Found");
+        goto point3;
+    }
+
+    struct stat st;
+    if (0 > stat(real_path, &st)) {
+        error(client_socket, 404, "Not Found");
+        goto point3;
+    }
+
+    bool add_slash = false;
+
+    if (S_ISDIR(st.st_mode)) {
+        char *found = br_mime_guess_index(real_path);
+
+        if (found == NULL) {
+            error(client_socket, 403, "Forbidden");
+            goto point3;
+        }
+
+        size_t path_len = strlen(path);
+        if (path_len > 0 && path[path_len - 1] != '/')
+            add_slash = true;
+
+        free(real_path);
+        real_path = found;
+    }
+
+    if (0 != access(real_path, F_OK)) {
+        error(client_socket, 500, "Internal Server Error");
+        goto point3;
+    }
+
+    if (add_slash) {
+        // production webservers usually returns 301 in such cases, but 302 is
+        // better for development/testing.
+        char *tmp = bc_strdup_printf(
+            "HTTP/1.0 302 Found\r\n"
+            "Location: %s/\r\n"
+            "Connection: close\r\n"
+            "\r\n", path);
+        write(client_socket, tmp, strlen(tmp));
+        free(tmp);
+        goto point3;
+    }
+
+    size_t len;
+    bc_error_t *err = NULL;
+    char* contents = bc_file_get_contents(real_path, false, &len, &err);
+    if (err != NULL) {
+        error(client_socket, 500, "Internal Server Error");
+        bc_error_free(err);
+        goto point3;
+    }
+
+    char *out = bc_strdup_printf(
+        "HTTP/1.0 200 OK\r\n"
+        "Content-Type: %s\r\n"
+        "Content-Length: %d\r\n"
+        "Connection: close\r\n"
+        "\r\n", br_mime_guess_content_type(real_path), len);
+    write(client_socket, out, strlen(out));
+    free(out);
+
+    write(client_socket, contents, len);
+
+point3:
+    free(real_root);
+point2:
+    free(real_path);
+point1:
+    bc_strv_free(pieces);
+    close(client_socket);
+    return NULL;
+}
+
+
+int
+br_httpd_run(const char *host, unsigned short port, const char *docroot)
+{
+    int server_socket = socket(AF_INET, SOCK_STREAM, 0);
+    if (server_socket == -1) {
+        fprintf(stderr, "Failed to open server socket: %s\n", strerror(errno));
+        return 1;
+    }
+
+    int rv = 0;
+
+    int value = 1;
+    if (setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &value, sizeof(int)) < 0) {
+        fprintf(stderr, "Failed to set socket option: %s\n", strerror(errno));
+        rv = 1;
+        goto cleanup;
+    }
+
+    struct sockaddr_in server_addr;
+    memset(&server_addr, 0, sizeof(struct sockaddr_in));
+    server_addr.sin_family = AF_INET;
+    server_addr.sin_port = htons(port);
+    if ((server_addr.sin_addr.s_addr = inet_addr(host)) == -1) {
+        fprintf(stderr, "Invalid server listen address: %s\n", host);
+        rv = 1;
+        goto cleanup;
+    }
+
+    if ((bind(server_socket, (struct sockaddr*) &server_addr,
+        sizeof(struct sockaddr_in))) == -1)
+    {
+        fprintf(stderr, "Failed to bind to server socket (%s:%d): %s\n",
+            host, port, strerror(errno));
+        rv = 1;
+        goto cleanup;
+    }
+
+    if (listen(server_socket, LISTEN_BACKLOG) == -1) {
+        fprintf(stderr, "Failed to listen to server socket: %s\n", strerror(errno));
+        rv = 1;
+        goto cleanup;
+    }
+
+    fprintf(stderr,
+        " * Running on http://%s:%d/\n"
+        "\n"
+        "WARNING!!! This is a development server, DO NOT RUN IT IN PRODUCTION!\n"
+        "\n", host, port);
+
+    socklen_t len = sizeof(struct sockaddr_in);
+
+    while (1) {
+        struct sockaddr_in client_addr;
+        int client_socket = accept(server_socket,
+            (struct sockaddr *) &client_addr, &len);
+        if (client_socket == -1) {
+            fprintf(stderr, "Failed to accept connection: %s\n", strerror(errno));
+            rv = 1;
+            goto cleanup;
+        }
+
+        request_data_t *arg = malloc(sizeof(request_data_t));
+        arg->socket = client_socket;
+        arg->docroot = docroot;
+
+        // this isn't really safe. the server can be easily DDoS'ed.
+        pthread_t thread;
+        if (pthread_create(&thread, NULL, handle_request, arg) != 0) {
+            fprintf(stderr, "Failed to create thread\n");
+            rv = 1;
+            goto cleanup;
+        }
+    }
+
+cleanup:
+    close(server_socket);
+    return rv;
+}
diff --git a/src/blogc-runserver/httpd.h b/src/blogc-runserver/httpd.h
new file mode 100644
index 0000000..a59a467
--- /dev/null
+++ b/src/blogc-runserver/httpd.h
@@ -0,0 +1,14 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifndef _HTTPD_H
+#define _HTTPD_H
+
+int br_httpd_run(const char *host, unsigned short port, const char *docroot);
+
+#endif /* _HTTPD_H */
diff --git a/src/blogc-runserver/main.c b/src/blogc-runserver/main.c
index 685b6e3..d12fc99 100644
--- a/src/blogc-runserver/main.c
+++ b/src/blogc-runserver/main.c
@@ -10,324 +10,12 @@
 #include <config.h>
 #endif /* HAVE_CONFIG_H */
 
-#include <event2/event.h>
-#include <event2/http.h>
-#include <event2/buffer.h>
 #include <signal.h>
-#include <stdbool.h>
-#include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
 #include "../common/utils.h"
-
-
-// mime types with index should be in the begin of the list. first NULL
-// index aborts the lookup, for optimization
-static const struct content_type_map {
-    const char *mimetype;
-    const char *extension;
-    const char *index;
-} content_types[] = {
-
-    // with index
-    {"text/html", "html", "index.html"},
-    {"text/html", "htm", "index.htm"},
-    {"text/html", "shtml", "index.shtml"},
-    {"text/xml", "xml", "index.xml"},
-    {"text/plain", "txt", "index.txt"},
-    {"application/xhtml+xml", "xhtml", "index.xhtml"},
-
-    // without index
-    {"text/css", "css", NULL},
-    {"image/gif", "gif", NULL},
-    {"image/jpeg", "jpeg", NULL},
-    {"image/jpeg", "jpg", NULL},
-    {"application/javascript", "js", NULL},
-    {"application/atom+xml", "atom", NULL},
-    {"application/rss+xml", "rss", NULL},
-    {"text/mathml", "mml", NULL},
-    {"text/vnd.sun.j2me.app-descriptor", "jad", NULL},
-    {"text/vnd.wap.wml", "wml", NULL},
-    {"text/x-component", "htc", NULL},
-    {"image/png", "png", NULL},
-    {"image/tiff", "tif", NULL},
-    {"image/tiff", "tiff", NULL},
-    {"image/vnd.wap.wbmp", "wbmp", NULL},
-    {"image/x-icon", "ico", NULL},
-    {"image/x-jng", "jng", NULL},
-    {"image/x-ms-bmp", "bmp", NULL},
-    {"image/svg+xml", "svg", NULL},
-    {"image/svg+xml", "svgz", NULL},
-    {"image/webp", "webp", NULL},
-    {"application/font-woff", "woff", NULL},
-    {"application/java-archive", "jar", NULL},
-    {"application/java-archive", "war", NULL},
-    {"application/java-archive", "ear", NULL},
-    {"application/json", "json", NULL},
-    {"application/mac-binhex40", "hqx", NULL},
-    {"application/msword", "doc", NULL},
-    {"application/pdf", "pdf", NULL},
-    {"application/postscript", "ps", NULL},
-    {"application/postscript", "eps", NULL},
-    {"application/postscript", "ai", NULL},
-    {"application/rtf", "rtf", NULL},
-    {"application/vnd.apple.mpegurl", "m3u8", NULL},
-    {"application/vnd.ms-excel", "xls", NULL},
-    {"application/vnd.ms-fontobject", "eot", NULL},
-    {"application/vnd.ms-powerpoint", "ppt", NULL},
-    {"application/vnd.wap.wmlc", "wmlc", NULL},
-    {"application/vnd.google-earth.kml+xml", "kml", NULL},
-    {"application/vnd.google-earth.kmz", "kmz", NULL},
-    {"application/x-7z-compressed", "7z", NULL},
-    {"application/x-cocoa", "cco", NULL},
-    {"application/x-java-archive-diff", "jardiff", NULL},
-    {"application/x-java-jnlp-file", "jnlp", NULL},
-    {"application/x-makeself", "run", NULL},
-    {"application/x-perl", "pl", NULL},
-    {"application/x-perl", "pm", NULL},
-    {"application/x-pilot", "prc", NULL},
-    {"application/x-pilot", "pdb", NULL},
-    {"application/x-rar-compressed", "rar", NULL},
-    {"application/x-redhat-package-manager", "rpm", NULL},
-    {"application/x-sea", "sea", NULL},
-    {"application/x-shockwave-flash", "swf", NULL},
-    {"application/x-stuffit", "sit", NULL},
-    {"application/x-tcl", "tcl", NULL},
-    {"application/x-tcl", "tk", NULL},
-    {"application/x-x509-ca-cert", "der", NULL},
-    {"application/x-x509-ca-cert", "pem", NULL},
-    {"application/x-x509-ca-cert", "crt", NULL},
-    {"application/x-xpinstall", "xpi", NULL},
-    {"application/xspf+xml", "xspf", NULL},
-    {"application/zip", "zip", NULL},
-    {"application/octet-stream", "bin", NULL},
-    {"application/octet-stream", "exe", NULL},
-    {"application/octet-stream", "dll", NULL},
-    {"application/octet-stream", "deb", NULL},
-    {"application/octet-stream", "dmg", NULL},
-    {"application/octet-stream", "iso", NULL},
-    {"application/octet-stream", "img", NULL},
-    {"application/octet-stream", "msi", NULL},
-    {"application/octet-stream", "msp", NULL},
-    {"application/octet-stream", "msm", NULL},
-    {"application/vnd.openxmlformats-officedocument.wordprocessingml.document", "docx", NULL},
-    {"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "xlsx", NULL},
-    {"application/vnd.openxmlformats-officedocument.presentationml.presentation", "pptx", NULL},
-    {"audio/midi", "mid", NULL},
-    {"audio/midi", "midi", NULL},
-    {"audio/midi", "kar", NULL},
-    {"audio/mpeg", "mp3", NULL},
-    {"audio/ogg", "ogg", NULL},
-    {"audio/x-m4a", "m4a", NULL},
-    {"audio/x-realaudio", "ra", NULL},
-    {"video/3gpp", "3gpp", NULL},
-    {"video/3gpp", "3gp", NULL},
-    {"video/mp2t", "ts", NULL},
-    {"video/mp4", "mp4", NULL},
-    {"video/mpeg", "mpeg", NULL},
-    {"video/mpeg", "mpg", NULL},
-    {"video/quicktime", "mov", NULL},
-    {"video/webm", "webm", NULL},
-    {"video/x-flv", "flv", NULL},
-    {"video/x-m4v", "m4v", NULL},
-    {"video/x-mng", "mng", NULL},
-    {"video/x-ms-asf", "asx", NULL},
-    {"video/x-ms-asf", "asf", NULL},
-    {"video/x-ms-wmv", "wmv", NULL},
-    {"video/x-msvideo", "avi", NULL},
-    {NULL, NULL, NULL}
-};
-
-
-static const char*
-get_extension(const char *filename)
-{
-    const char *ext = NULL;
-    unsigned int i;
-    for (i = strlen(filename); i > 0; i--) {
-        if (filename[i] == '.') {
-            ext = filename + i + 1;
-            break;
-        }
-    }
-    if (i == 0)
-        return NULL;
-    return ext;
-}
-
-
-static const char*
-guess_content_type(const char *filename)
-{
-    const char *extension = get_extension(filename);
-    if (extension == NULL)
-        goto default_type;
-    for (unsigned int i = 0; content_types[i].extension != NULL; i++) {
-        if (0 == strcmp(content_types[i].extension, extension)) {
-            return content_types[i].mimetype;
-        }
-    }
-default_type:
-    return "application/octet-stream";
-}
-
-
-static void
-handler(struct evhttp_request *request, void *ptr)
-{
-    const char *root = ptr;
-    const char *uri = evhttp_request_get_uri(request);
-
-    struct evhttp_uri *decoded_uri = evhttp_uri_parse(uri);
-    if (decoded_uri == NULL) {
-        evhttp_send_error(request, 400, "Bad request");
-        return;
-    }
-
-    const char *path = evhttp_uri_get_path(decoded_uri);
-    if (path == NULL)
-        path = "/";
-
-    char *decoded_path = evhttp_uridecode(path, 0, NULL);
-    if (decoded_path == NULL) {
-        evhttp_send_error(request, 400, "Bad request");
-        goto point1;
-    }
-
-    char *abs_path = bc_strdup_printf("%s/%s", root, decoded_path);
-    char *real_path = realpath(abs_path, NULL);
-    free(abs_path);
-
-    if (real_path == NULL) {
-        evhttp_send_error(request, 404, "Not found");
-        goto point2;
-    }
-
-    char *real_root = realpath(root, NULL);
-    if (real_root == NULL) {
-        evhttp_send_error(request, 500, "Internal server error");
-        goto point3;
-    }
-
-    if (0 != strncmp(real_root, real_path, strlen(real_root))) {
-        evhttp_send_error(request, 404, "Not found");
-        goto point4;
-    }
-
-    struct stat st;
-    if (0 > stat(real_path, &st)) {
-        evhttp_send_error(request, 404, "Not found");
-        goto point4;
-    }
-
-    bool add_slash = false;
-
-    if (S_ISDIR(st.st_mode)) {
-        char *found = NULL;
-
-        for (unsigned int i = 0; content_types[i].index != NULL; i++) {
-            char *f = bc_strdup_printf("%s/%s", real_path,
-                content_types[i].index);
-            if (0 == access(f, F_OK)) {
-                found = f;
-                break;
-            }
-            free(f);
-        }
-
-        if (found == NULL) {
-            evhttp_send_error(request, 403, "Forbidden");
-            goto point4;
-        }
-
-        size_t path_len = strlen(path);
-        if (path_len > 0 && path[path_len - 1] != '/')
-            add_slash = true;
-
-        free(real_path);
-        real_path = found;
-    }
-
-    int fd;
-    if ((fd = open(real_path, O_RDONLY)) < 0) {
-        evhttp_send_error(request, 500, "Internal server error");
-        goto point4;
-    }
-
-    const char *type = guess_content_type(real_path);
-
-    if (fstat(fd, &st) < 0) {
-        evhttp_send_error(request, 500, "Internal server error");
-        goto point4;
-    }
-
-    struct evkeyvalq *headers = evhttp_request_get_output_headers(request);
-
-    if (add_slash) {
-        char *tmp = bc_strdup_printf("%s/", path);
-        evhttp_add_header(headers, "Location", tmp);
-        free(tmp);
-        // production webservers usually returns 301 in such cases, but 302 is
-        // better for development/testing.
-        evhttp_send_reply(request, 302, "Found", NULL);
-        goto point4;
-    }
-
-    evhttp_add_header(headers, "Content-Type", type);
-    char *content_length = bc_strdup_printf("%zu", st.st_size);
-    evhttp_add_header(headers, "Content-Length", content_length);
-    free(content_length);
-
-    struct evbuffer *evb = evbuffer_new();
-    evbuffer_add_file(evb, fd, 0, st.st_size);
-    evhttp_send_reply(request, 200, "OK", evb);
-
-point4:
-    free(real_root);
-point3:
-    free(real_path);
-point2:
-    free(decoded_path);
-point1:
-    evhttp_uri_free(decoded_uri);
-}
-
-
-static int
-runserver(const char *address, unsigned short port, const char *root)
-{
-    struct event_base *base = event_base_new();
-    if (base == NULL) {
-        fprintf(stderr, "error: failed to initialize event base\n");
-        return 1;
-    }
-
-    struct evhttp *http = evhttp_new(base);
-    if (http == NULL) {
-        fprintf(stderr, "error: failed to initialize HTTP server\n");
-        return 1;
-    }
-
-    evhttp_set_gencb(http, handler, (char*) root);
-
-    evhttp_set_allowed_methods(http, EVHTTP_REQ_GET | EVHTTP_REQ_HEAD);
-
-    if (0 != evhttp_bind_socket(http, address, port)) {
-        fprintf(stderr, "error: failed to bind socket to %s:%d\n", address,
-            port);
-        return 1;
-    }
-
-    fprintf(stderr, " * Running on http://%s:%d/\n", address, port);
-
-    event_base_dispatch(base);
-
-    return 0;
-}
+#include "httpd.h"
 
 
 static void
@@ -421,7 +109,7 @@ main(int argc, char **argv)
     if (host == NULL)
         host = bc_strdup("127.0.0.1");
 
-    rv = runserver(host, port, docroot);
+    rv = br_httpd_run(host, port, docroot);
 
 cleanup:
     free(host);
diff --git a/src/blogc-runserver/mime.c b/src/blogc-runserver/mime.c
new file mode 100644
index 0000000..b42d70a
--- /dev/null
+++ b/src/blogc-runserver/mime.c
@@ -0,0 +1,168 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif /* HAVE_CONFIG_H */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "../common/utils.h"
+#include "httpd-utils.h"
+
+
+// mime types with index should be in the begin of the list. first NULL
+// index aborts the lookup, for optimization
+static const struct content_type_map {
+    const char *mimetype;
+    const char *extension;
+    const char *index;
+} content_types[] = {
+
+    // with index
+    {"text/html", "html", "index.html"},
+    {"text/html", "htm", "index.htm"},
+    {"text/html", "shtml", "index.shtml"},
+    {"text/xml", "xml", "index.xml"},
+    {"text/plain", "txt", "index.txt"},
+    {"application/xhtml+xml", "xhtml", "index.xhtml"},
+
+    // without index
+    {"text/css", "css", NULL},
+    {"image/gif", "gif", NULL},
+    {"image/jpeg", "jpeg", NULL},
+    {"image/jpeg", "jpg", NULL},
+    {"application/javascript", "js", NULL},
+    {"application/atom+xml", "atom", NULL},
+    {"application/rss+xml", "rss", NULL},
+    {"text/mathml", "mml", NULL},
+    {"text/vnd.sun.j2me.app-descriptor", "jad", NULL},
+    {"text/vnd.wap.wml", "wml", NULL},
+    {"text/x-component", "htc", NULL},
+    {"image/png", "png", NULL},
+    {"image/tiff", "tif", NULL},
+    {"image/tiff", "tiff", NULL},
+    {"image/vnd.wap.wbmp", "wbmp", NULL},
+    {"image/x-icon", "ico", NULL},
+    {"image/x-jng", "jng", NULL},
+    {"image/x-ms-bmp", "bmp", NULL},
+    {"image/svg+xml", "svg", NULL},
+    {"image/svg+xml", "svgz", NULL},
+    {"image/webp", "webp", NULL},
+    {"application/font-woff", "woff", NULL},
+    {"application/java-archive", "jar", NULL},
+    {"application/java-archive", "war", NULL},
+    {"application/java-archive", "ear", NULL},
+    {"application/json", "json", NULL},
+    {"application/mac-binhex40", "hqx", NULL},
+    {"application/msword", "doc", NULL},
+    {"application/pdf", "pdf", NULL},
+    {"application/postscript", "ps", NULL},
+    {"application/postscript", "eps", NULL},
+    {"application/postscript", "ai", NULL},
+    {"application/rtf", "rtf", NULL},
+    {"application/vnd.apple.mpegurl", "m3u8", NULL},
+    {"application/vnd.ms-excel", "xls", NULL},
+    {"application/vnd.ms-fontobject", "eot", NULL},
+    {"application/vnd.ms-powerpoint", "ppt", NULL},
+    {"application/vnd.wap.wmlc", "wmlc", NULL},
+    {"application/vnd.google-earth.kml+xml", "kml", NULL},
+    {"application/vnd.google-earth.kmz", "kmz", NULL},
+    {"application/x-7z-compressed", "7z", NULL},
+    {"application/x-cocoa", "cco", NULL},
+    {"application/x-java-archive-diff", "jardiff", NULL},
+    {"application/x-java-jnlp-file", "jnlp", NULL},
+    {"application/x-makeself", "run", NULL},
+    {"application/x-perl", "pl", NULL},
+    {"application/x-perl", "pm", NULL},
+    {"application/x-pilot", "prc", NULL},
+    {"application/x-pilot", "pdb", NULL},
+    {"application/x-rar-compressed", "rar", NULL},
+    {"application/x-redhat-package-manager", "rpm", NULL},
+    {"application/x-sea", "sea", NULL},
+    {"application/x-shockwave-flash", "swf", NULL},
+    {"application/x-stuffit", "sit", NULL},
+    {"application/x-tcl", "tcl", NULL},
+    {"application/x-tcl", "tk", NULL},
+    {"application/x-x509-ca-cert", "der", NULL},
+    {"application/x-x509-ca-cert", "pem", NULL},
+    {"application/x-x509-ca-cert", "crt", NULL},
+    {"application/x-xpinstall", "xpi", NULL},
+    {"application/xspf+xml", "xspf", NULL},
+    {"application/zip", "zip", NULL},
+    {"application/octet-stream", "bin", NULL},
+    {"application/octet-stream", "exe", NULL},
+    {"application/octet-stream", "dll", NULL},
+    {"application/octet-stream", "deb", NULL},
+    {"application/octet-stream", "dmg", NULL},
+    {"application/octet-stream", "iso", NULL},
+    {"application/octet-stream", "img", NULL},
+    {"application/octet-stream", "msi", NULL},
+    {"application/octet-stream", "msp", NULL},
+    {"application/octet-stream", "msm", NULL},
+    {"application/vnd.openxmlformats-officedocument.wordprocessingml.document", "docx", NULL},
+    {"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "xlsx", NULL},
+    {"application/vnd.openxmlformats-officedocument.presentationml.presentation", "pptx", NULL},
+    {"audio/midi", "mid", NULL},
+    {"audio/midi", "midi", NULL},
+    {"audio/midi", "kar", NULL},
+    {"audio/mpeg", "mp3", NULL},
+    {"audio/ogg", "ogg", NULL},
+    {"audio/x-m4a", "m4a", NULL},
+    {"audio/x-realaudio", "ra", NULL},
+    {"video/3gpp", "3gpp", NULL},
+    {"video/3gpp", "3gp", NULL},
+    {"video/mp2t", "ts", NULL},
+    {"video/mp4", "mp4", NULL},
+    {"video/mpeg", "mpeg", NULL},
+    {"video/mpeg", "mpg", NULL},
+    {"video/quicktime", "mov", NULL},
+    {"video/webm", "webm", NULL},
+    {"video/x-flv", "flv", NULL},
+    {"video/x-m4v", "m4v", NULL},
+    {"video/x-mng", "mng", NULL},
+    {"video/x-ms-asf", "asx", NULL},
+    {"video/x-ms-asf", "asf", NULL},
+    {"video/x-ms-wmv", "wmv", NULL},
+    {"video/x-msvideo", "avi", NULL},
+    {NULL, NULL, NULL}
+};
+
+
+const char*
+br_mime_guess_content_type(const char *filename)
+{
+    const char *extension = br_get_extension(filename);
+    if (extension == NULL)
+        goto default_type;
+    for (size_t i = 0; content_types[i].extension != NULL; i++) {
+        if (0 == strcmp(content_types[i].extension, extension)) {
+            return content_types[i].mimetype;
+        }
+    }
+
+default_type:
+    return "application/octet-stream";
+}
+
+
+char*
+br_mime_guess_index(const char *path)
+{
+    char *found = NULL;
+    for (size_t i = 0; content_types[i].index != NULL; i++) {
+        char *f = bc_strdup_printf("%s/%s", path, content_types[i].index);
+        if (0 == access(f, F_OK)) {
+            found = f;
+            break;
+        }
+        free(f);
+    }
+    return found;
+}
diff --git a/src/blogc-runserver/mime.h b/src/blogc-runserver/mime.h
new file mode 100644
index 0000000..a4b6409
--- /dev/null
+++ b/src/blogc-runserver/mime.h
@@ -0,0 +1,15 @@
+/*
+ * blogc: A blog compiler.
+ * Copyright (C) 2015-2016 Rafael G. Martins <rafael@rafaelmartins.eng.br>
+ *
+ * This program can be distributed under the terms of the BSD License.
+ * See the file LICENSE.
+ */
+
+#ifndef _MIME_H
+#define _MIME_H
+
+const char* br_mime_guess_content_type(const char *filename);
+char* br_mime_guess_index(const char *path);
+
+#endif /* _MIME_H */