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! ;)

1 files changed, 2 insertions, 314 deletions

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);