civetweb/test/unit_test.c

/* Copyright (c) 2013-2014 the Civetweb developers
 * Copyright (c) 2004-2013 Sergey Lyubka
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/* Unit test for the civetweb web server. Tests embedded API.
 */
#define USE_WEBSOCKET

#ifndef _WIN32
#define __cdecl
#define USE_IPV6
#endif

/* USE_* definitions must be made before #include "civetweb.c" !
 * We include the source file so that our object file will have visibility to
 * all the static functions.
 */

#include "civetweb.c"

static int s_total_tests = 0;
static int s_failed_tests = 0;

#define FAIL(str, line) do {                     \
    printf("Fail on line %d: [%s]\n", line, str);   \
    s_failed_tests++; \
} while (0)

#define ASSERT(expr) do { \
    s_total_tests++; \
    if (!(expr)) FAIL(#expr, __LINE__); \
} while (0)

/* TODO(bel):
#define HTTP_PORT "56789"
#define HTTPS_PORT "56790"
#define HTTP_PORT2 "56791"
#define LISTENING_ADDR          \
    "127.0.0.1:" HTTP_PORT "r"    \
    ",127.0.0.1:" HTTPS_PORT "s"  \
    ",127.0.0.1:" HTTP_PORT2
*/
#define HTTP_PORT "8080"
#ifdef NO_SSL
#define HTTPS_PORT HTTP_PORT
#define LISTENING_ADDR "127.0.0.1:" HTTP_PORT
#else
#define HTTP_REDIRECT_PORT "8088"
#define HTTPS_PORT "8443"
#define LISTENING_ADDR "127.0.0.1:" HTTP_PORT ",127.0.0.1:" HTTP_REDIRECT_PORT "r" ",127.0.0.1:" HTTPS_PORT "s"
#endif

static void test_parse_http_message() {
    struct mg_request_info ri;
    char req1[] = "GET / HTTP/1.1\r\n\r\n";
    char req2[] = "BLAH / HTTP/1.1\r\n\r\n";
    char req3[] = "GET / HTTP/1.1\r\nBah\r\n";
    char req4[] = "GET / HTTP/1.1\r\nA: foo bar\r\nB: bar\r\nbaz\r\n\r\n";
    char req5[] = "GET / HTTP/1.1\r\n\r\n";
    char req6[] = "G";
    char req7[] = " blah ";
    char req8[] = " HTTP/1.1 200 OK \n\n";
    char req9[] = "HTTP/1.1 200 OK\r\nConnection: close\r\n\r\n";

    ASSERT(parse_http_message(req9, sizeof(req9), &ri) == sizeof(req9) - 1);
    ASSERT(ri.num_headers == 1);

    ASSERT(parse_http_message(req1, sizeof(req1), &ri) == sizeof(req1) - 1);
    ASSERT(strcmp(ri.http_version, "1.1") == 0);
    ASSERT(ri.num_headers == 0);

    ASSERT(parse_http_message(req2, sizeof(req2), &ri) == -1);
    ASSERT(parse_http_message(req3, sizeof(req3), &ri) == 0);
    ASSERT(parse_http_message(req6, sizeof(req6), &ri) == 0);
    ASSERT(parse_http_message(req7, sizeof(req7), &ri) == 0);
    ASSERT(parse_http_message("", 0, &ri) == 0);
    ASSERT(parse_http_message(req8, sizeof(req8), &ri) == sizeof(req8) - 1);

    /* TODO(lsm): Fix this. Header value may span multiple lines. */
    ASSERT(parse_http_message(req4, sizeof(req4), &ri) == sizeof(req4) - 1);
    ASSERT(strcmp(ri.http_version, "1.1") == 0);
    ASSERT(ri.num_headers == 3);
    ASSERT(strcmp(ri.http_headers[0].name, "A") == 0);
    ASSERT(strcmp(ri.http_headers[0].value, "foo bar") == 0);
    ASSERT(strcmp(ri.http_headers[1].name, "B") == 0);
    ASSERT(strcmp(ri.http_headers[1].value, "bar") == 0);
    ASSERT(strcmp(ri.http_headers[2].name, "baz\r\n\r") == 0);
    ASSERT(strcmp(ri.http_headers[2].value, "") == 0);

    ASSERT(parse_http_message(req5, sizeof(req5), &ri) == sizeof(req5) - 1);
    ASSERT(strcmp(ri.request_method, "GET") == 0);
    ASSERT(strcmp(ri.http_version, "1.1") == 0);
}

static void test_should_keep_alive(void) {
    struct mg_connection conn;
    struct mg_context ctx;
    char req1[] = "GET / HTTP/1.1\r\n\r\n";
    char req2[] = "GET / HTTP/1.0\r\n\r\n";
    char req3[] = "GET / HTTP/1.1\r\nConnection: close\r\n\r\n";
    char req4[] = "GET / HTTP/1.1\r\nConnection: keep-alive\r\n\r\n";

    memset(&conn, 0, sizeof(conn));
    conn.ctx = &ctx;
    ASSERT(parse_http_message(req1, sizeof(req1), &conn.request_info) ==
        sizeof(req1) - 1);

    ctx.config[ENABLE_KEEP_ALIVE] = "no";
    ASSERT(should_keep_alive(&conn) == 0);

    ctx.config[ENABLE_KEEP_ALIVE] = "yes";
    ASSERT(should_keep_alive(&conn) == 1);

    conn.must_close = 1;
    ASSERT(should_keep_alive(&conn) == 0);

    conn.must_close = 0;
    parse_http_message(req2, sizeof(req2), &conn.request_info);
    ASSERT(should_keep_alive(&conn) == 0);

    parse_http_message(req3, sizeof(req3), &conn.request_info);
    ASSERT(should_keep_alive(&conn) == 0);

    parse_http_message(req4, sizeof(req4), &conn.request_info);
    ASSERT(should_keep_alive(&conn) == 1);

    conn.status_code = 401;
    ASSERT(should_keep_alive(&conn) == 0);

    conn.status_code = 200;
    conn.must_close = 1;
    ASSERT(should_keep_alive(&conn) == 0);
}

static void test_match_prefix(void) {
    ASSERT(match_prefix("/api", 4, "/api") == 4);
    ASSERT(match_prefix("/a/", 3, "/a/b/c") == 3);
    ASSERT(match_prefix("/a/", 3, "/ab/c") == -1);
    ASSERT(match_prefix("/*/", 3, "/ab/c") == 4);
    ASSERT(match_prefix("**", 2, "/a/b/c") == 6);
    ASSERT(match_prefix("/*", 2, "/a/b/c") == 2);
    ASSERT(match_prefix("*/*", 3, "/a/b/c") == 2);
    ASSERT(match_prefix("**/", 3, "/a/b/c") == 5);
    ASSERT(match_prefix("**.foo|**.bar", 13, "a.bar") == 5);
    ASSERT(match_prefix("a|b|cd", 6, "cdef") == 2);
    ASSERT(match_prefix("a|b|c?", 6, "cdef") == 2);
    ASSERT(match_prefix("a|?|cd", 6, "cdef") == 1);
    ASSERT(match_prefix("/a/**.cgi", 9, "/foo/bar/x.cgi") == -1);
    ASSERT(match_prefix("/a/**.cgi", 9, "/a/bar/x.cgi") == 12);
    ASSERT(match_prefix("**/", 3, "/a/b/c") == 5);
    ASSERT(match_prefix("**/$", 4, "/a/b/c") == -1);
    ASSERT(match_prefix("**/$", 4, "/a/b/") == 5);
    ASSERT(match_prefix("$", 1, "") == 0);
    ASSERT(match_prefix("$", 1, "x") == -1);
    ASSERT(match_prefix("*$", 2, "x") == 1);
    ASSERT(match_prefix("/$", 2, "/") == 1);
    ASSERT(match_prefix("**/$", 4, "/a/b/c") == -1);
    ASSERT(match_prefix("**/$", 4, "/a/b/") == 5);
    ASSERT(match_prefix("*", 1, "/hello/") == 0);
    ASSERT(match_prefix("**.a$|**.b$", 11, "/a/b.b/") == -1);
    ASSERT(match_prefix("**.a$|**.b$", 11, "/a/b.b") == 6);
    ASSERT(match_prefix("**.a$|**.b$", 11, "/a/B.A") == 6);
    ASSERT(match_prefix("**o$", 4, "HELLO") == 5);
}

static void test_remove_double_dots() {
    struct { char before[20], after[20]; } data[] = {
        {"////a", "/a"},
        {"/.....", "/."},
        {"/......", "/"},
        {"...", "..."},
        {"/...///", "/./"},
        {"/a...///", "/a.../"},
        {"/.x", "/.x"},
        {"/\\", "/"},
        {"/a\\", "/a\\"},
        {"/a\\\\...", "/a\\."},
    };
    size_t i;

    for (i = 0; i < ARRAY_SIZE(data); i++) {
        remove_double_dots_and_double_slashes(data[i].before);
        ASSERT(strcmp(data[i].before, data[i].after) == 0);
    }
}

static char *read_file(const char *path, int *size) {
    FILE *fp;
    struct stat st;
    char *data = NULL;
    if ((fp = fopen(path, "rb")) != NULL && !fstat(fileno(fp), &st)) {
        *size = (int) st.st_size;
        ASSERT((data = mg_malloc(*size)) != NULL);
        ASSERT(fread(data, 1, *size, fp) == (size_t) *size);
        fclose(fp);
    }
    return data;
}

static long fetch_data_size = 1024*1024;
static char *fetch_data;
static const char *inmemory_file_data = "hi there";
static const char *upload_filename = "upload_test.txt";
static const char *upload_filename2 = "upload_test2.txt";
static const char *upload_ok_message = "upload successful";

static const char *open_file_cb(const struct mg_connection *conn,
    const char *path, size_t *size) {
        (void) conn;
        if (!strcmp(path, "./blah")) {
            *size = strlen(inmemory_file_data);
            return inmemory_file_data;
        }
        return NULL;
}

static void upload_cb(struct mg_connection *conn, const char *path) {
    const struct mg_request_info *ri = mg_get_request_info(conn);
    char *p1, *p2;
    int len1, len2;

    if (atoi(ri->query_string) == 1) {
        ASSERT(!strcmp(path, "./upload_test.txt"));
        ASSERT((p1 = read_file("src/civetweb.c", &len1)) != NULL);
        ASSERT((p2 = read_file(path, &len2)) != NULL);
        ASSERT(len1 == len2);
        ASSERT(memcmp(p1, p2, len1) == 0);
        mg_free(p1), mg_free(p2);
        remove(upload_filename);
    } else if (atoi(ri->query_string) == 2) {
        if (!strcmp(path, "./upload_test.txt")) {
            ASSERT((p1 = read_file("include/civetweb.h", &len1)) != NULL);
            ASSERT((p2 = read_file(path, &len2)) != NULL);
            ASSERT(len1 == len2);
            ASSERT(memcmp(p1, p2, len1) == 0);
            mg_free(p1), mg_free(p2);
            remove(upload_filename);
        } else if (!strcmp(path, "./upload_test2.txt")) {
            ASSERT((p1 = read_file("README.md", &len1)) != NULL);
            ASSERT((p2 = read_file(path, &len2)) != NULL);
            ASSERT(len1 == len2);
            ASSERT(memcmp(p1, p2, len1) == 0);
            mg_free(p1), mg_free(p2);
            remove(upload_filename);
        } else {
            ASSERT(0);
        }
    } else {
        ASSERT(0);
    }

    mg_printf(conn, "HTTP/1.0 200 OK\r\nContent-Length: %d\r\n\r\n%s",
        (int) strlen(upload_ok_message), upload_ok_message);
}

static int begin_request_handler_cb(struct mg_connection *conn) {

    const struct mg_request_info *ri = mg_get_request_info(conn);
    int req_len = (int)(ri->content_length);
    const char * s_req_len = mg_get_header(conn, "Content-Length");
    char *data;
    long to_write, write_now;
    int bytes_read, bytes_written;

    ASSERT( ((req_len == -1) && (s_req_len==NULL)) || ((s_req_len != NULL) && (req_len = atol(s_req_len))) );

    if (!strncmp(ri->uri, "/data/", 6)) {
        if (!strcmp(ri->uri+6, "all")) {
            to_write = fetch_data_size;
        } else {
            to_write = atol(ri->uri+6);
        }
        mg_printf(conn, "HTTP/1.1 200 OK\r\n"
            "Connection: close\r\n"
            "Content-Length: %li\r\n"
            "Content-Type: text/plain\r\n\r\n",
            to_write);
        while (to_write>0) {
            write_now = to_write > fetch_data_size ? fetch_data_size : to_write;
            bytes_written = mg_write(conn, fetch_data, write_now);
            ASSERT(bytes_written == write_now);
            to_write -= bytes_written;
        }
        close_connection(conn);
        return 1;
    }

    if (!strcmp(ri->uri, "/content_length")) {
        if (req_len>0) {
            data = mg_malloc(req_len);
            assert(data != NULL);
            bytes_read = mg_read(conn, data, req_len);
            ASSERT(bytes_read == req_len);

            mg_printf(conn, "HTTP/1.1 200 OK\r\n"
                "Connection: close\r\n"
                "Content-Length: %d\r\n"   /* The official definition */
                "Content-Type: text/plain\r\n\r\n",
                bytes_read);
            mg_write(conn, data, bytes_read);

            mg_free(data);
        } else {
            data = mg_malloc(1024);
            assert(data != NULL);
            bytes_read = mg_read(conn, data, 1024);

            mg_printf(conn, "HTTP/1.1 200 OK\r\n"
                "Connection: close\r\n"
                "Content-Type: text/plain\r\n\r\n"
                );
            mg_write(conn, data, bytes_read);

            mg_free(data);
        }
        close_connection(conn);
        return 1;
    }

    if (!strcmp(ri->uri, "/upload")) {
        ASSERT(ri->query_string != NULL);
        ASSERT(mg_upload(conn, ".") == atoi(ri->query_string));
    }

    return 0;
}

static int log_message_cb(const struct mg_connection *conn, const char *msg) {
    (void) conn;
    printf("%s\n", msg);
    return 0;
}


int  (*begin_request)(struct mg_connection *);
void (*end_request)(const struct mg_connection *, int reply_status_code);
int  (*log_message)(const struct mg_connection *, const char *message);
int  (*init_ssl)(void *ssl_context, void *user_data);
int (*websocket_connect)(const struct mg_connection *);
void (*websocket_ready)(struct mg_connection *);
int  (*websocket_data)(struct mg_connection *, int bits,
    char *data, size_t data_len);
void (*connection_close)(struct mg_connection *);
const char * (*open_file)(const struct mg_connection *,
    const char *path, size_t *data_len);
void (*init_lua)(struct mg_connection *, void *lua_context);
void (*upload)(struct mg_connection *, const char *file_name);
int  (*http_error)(struct mg_connection *, int status);

static const struct mg_callbacks CALLBACKS = {
    &begin_request_handler_cb, NULL, &log_message_cb, NULL, NULL, NULL, NULL, NULL,
    &open_file_cb, NULL, &upload_cb, NULL
};

static const char *OPTIONS[] = {
    "document_root", ".",
    "listening_ports", LISTENING_ADDR,
    "enable_keep_alive", "yes",
#ifndef NO_SSL
    "ssl_certificate", "../resources/ssl_cert.pem",
#endif
    NULL,
};

static char *read_conn(struct mg_connection *conn, int *size) {
    char buf[100], *data = NULL;
    int len;
    *size = 0;
    while ((len = mg_read(conn, buf, sizeof(buf))) > 0) {
        *size += len;
        ASSERT((data = mg_realloc(data, *size)) != NULL);
        memcpy(data + *size - len, buf, len);
    }
    return data;
}

static void test_mg_download(int use_ssl) {

    const char *test_data = "123456789A123456789B";

    char *p1, *p2, ebuf[100];
    const char *h;
    int i, len1, len2, port;
    struct mg_connection *conn;
    struct mg_context *ctx;
    if (use_ssl) port = atoi(HTTPS_PORT); else port = atoi(HTTP_PORT);

    ASSERT((ctx = mg_start(&CALLBACKS, NULL, OPTIONS)) != NULL);

    ASSERT(mg_download(NULL, port, use_ssl, ebuf, sizeof(ebuf), "%s", "") == NULL);
    ASSERT(mg_download("localhost", 0, use_ssl, ebuf, sizeof(ebuf), "%s", "") == NULL);
    ASSERT(mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf), "%s", "") == NULL);

    /* Fetch nonexistent file, should see 404 */
    ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf), "%s",
        "GET /gimbec HTTP/1.0\r\n\r\n")) != NULL);
    ASSERT(strcmp(conn->request_info.uri, "404") == 0);
    mg_close_connection(conn);

    if (use_ssl) {
        ASSERT((conn = mg_download("google.com", 443, 1, ebuf, sizeof(ebuf), "%s",
            "GET / HTTP/1.0\r\n\r\n")) != NULL);
        mg_close_connection(conn);
    } else {
        ASSERT((conn = mg_download("google.com", 80, 0, ebuf, sizeof(ebuf), "%s",
            "GET / HTTP/1.0\r\n\r\n")) != NULL);
        mg_close_connection(conn);
    }

    /* Fetch unit_test.c, should succeed */
    ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf), "%s",
        "GET /unit_test.c HTTP/1.0\r\n\r\n")) != NULL);
    ASSERT(&conn->request_info == mg_get_request_info(conn));
    ASSERT(!strcmp(conn->request_info.uri, "200"));
    ASSERT((p1 = read_conn(conn, &len1)) != NULL);
    ASSERT((p2 = read_file("unit_test.c", &len2)) != NULL);
    ASSERT(len1 == len2);
    ASSERT(memcmp(p1, p2, len1) == 0);
    mg_free(p1), mg_free(p2);
    mg_close_connection(conn);

    /* Fetch in-memory file, should succeed. */
    ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf), "%s",
        "GET /blah HTTP/1.1\r\n\r\n")) != NULL);
    ASSERT((p1 = read_conn(conn, &len1)) != NULL);
    ASSERT(len1 == (int) strlen(inmemory_file_data));
    ASSERT(memcmp(p1, inmemory_file_data, len1) == 0);
    mg_free(p1);
    mg_close_connection(conn);

    /* Fetch in-memory data with no Content-Length, should succeed. */
    ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf), "%s",
        "GET /data/all HTTP/1.1\r\n\r\n")) != NULL);
    ASSERT(conn->request_info.content_length == fetch_data_size);
    ASSERT((p1 = read_conn(conn, &len1)) != NULL);
    ASSERT(len1 == (int) fetch_data_size);
    ASSERT(memcmp(p1, fetch_data, len1) == 0);
    mg_free(p1);
    mg_close_connection(conn);

    /* Fetch in-memory data with no Content-Length, should succeed. */
    for (i=0; i<=1024*1024*8; i += (i<2 ? 1 : i)) {
        ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf),
            "GET /data/%i HTTP/1.1\r\n\r\n", i)) != NULL);
        ASSERT(conn->request_info.content_length == i);
        len1 = -1;
        p1 = read_conn(conn, &len1);
        if (i==0) {
            ASSERT(len1 == 0);
            ASSERT(p1 == 0);
        } else if (i<=fetch_data_size) {
            ASSERT(p1 != NULL);
            ASSERT(len1 == i);
            ASSERT(memcmp(p1, fetch_data, len1) == 0);
        } else {
            ASSERT(p1 != NULL);
            ASSERT(len1 == i);
            ASSERT(memcmp(p1, fetch_data, fetch_data_size) == 0);
        }

        mg_free(p1);
        mg_close_connection(conn);
    }

    /* Fetch data with Content-Length, should succeed and return the defined length. */
    ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf),
        "POST /content_length HTTP/1.1\r\nContent-Length: %u\r\n\r\n%s",
        strlen(test_data), test_data)) != NULL);
    h = mg_get_header(conn, "Content-Length");
    ASSERT((h != NULL) && (atoi(h)==strlen(test_data)));
    ASSERT((p1 = read_conn(conn, &len1)) != NULL);
    ASSERT(len1 == (int) strlen(test_data));
    ASSERT(conn->request_info.content_length == strlen(test_data));
    ASSERT(memcmp(p1, test_data, len1) == 0);
    ASSERT(strcmp(conn->request_info.request_method, "HTTP/1.1") == 0);
    ASSERT(strcmp(conn->request_info.uri, "200") == 0);
    ASSERT(strcmp(conn->request_info.http_version, "OK") == 0);
    mg_free(p1);
    mg_close_connection(conn);

    /* Fetch data without Content-Length, should succeed. It has no content-length header field,
       but still returns the correct amount of data. It is much slower, since it needs to wait
       for the connection shutdown. */
    ASSERT((conn = mg_download("localhost", port, use_ssl, ebuf, sizeof(ebuf),
        "POST /content_length HTTP/1.1\r\n\r\n%s", test_data)) != NULL);
    h = mg_get_header(conn, "Content-Length");
    ASSERT(h == NULL);
    ASSERT(conn->request_info.content_length == -1);
    ASSERT((p1 = read_conn(conn, &len1)) != NULL);
    ASSERT(len1 == (int) strlen(test_data));
    ASSERT(memcmp(p1, test_data, len1) == 0);
    mg_free(p1);
    mg_close_connection(conn);

    /* Test non existent */
    ASSERT((conn = mg_download("localhost", port, use_ssl,
        ebuf, sizeof(ebuf), "%s",
        "GET /non_exist HTTP/1.1\r\n\r\n")) != NULL);
    ASSERT(strcmp(conn->request_info.request_method, "HTTP/1.1") == 0);
    ASSERT(strcmp(conn->request_info.uri, "404") == 0);
    ASSERT(strcmp(conn->request_info.http_version, "Not Found") == 0);
    mg_close_connection(conn);

    if (use_ssl) {
        /* Test SSL redirect */
        ASSERT((conn = mg_download("localhost", atoi(HTTP_REDIRECT_PORT), 0,
            ebuf, sizeof(ebuf), "%s",
            "GET /data/4711 HTTP/1.1\r\n\r\n")) != NULL);
        ASSERT(strcmp(conn->request_info.uri, "302") == 0);
        h = mg_get_header(conn, "Location");
        ASSERT(h != NULL);
        ASSERT(strcmp(h, "https://127.0.0.1:" HTTPS_PORT "/data/4711") == 0);
        mg_close_connection(conn);
    }

    mg_stop(ctx);
}

static int alloc_printf(char **buf, size_t size, char *fmt, ...) {
    va_list ap;
    va_start(ap, fmt);
    return alloc_vprintf(buf, size, fmt, ap);
}

static void test_mg_upload(void) {
    static const char *boundary = "OOO___MY_BOUNDARY___OOO";
    struct mg_context *ctx;
    struct mg_connection *conn;
    char ebuf[100], buf[20], *file_data, *file2_data, *post_data;
    int file_len, file2_len, post_data_len;

    ASSERT((ctx = mg_start(&CALLBACKS, NULL, OPTIONS)) != NULL);

    /* Upload one file */
    ASSERT((file_data = read_file("unit_test.c", &file_len)) != NULL);
    post_data = NULL;
    post_data_len = alloc_printf(&post_data, 0,
        "--%s\r\n"
        "Content-Disposition: form-data; "
        "name=\"file\"; "
        "filename=\"%s\"\r\n\r\n"
        "%.*s\r\n"
        "--%s--\r\n",
        boundary, upload_filename,
        file_len, file_data, boundary);
    ASSERT(post_data_len > 0);

#if 0 /* TODO (bel): ... */
    ASSERT((conn = mg_download("localhost", atoi(HTTPS_PORT), 1,
        ebuf, sizeof(ebuf),
        "POST /upload?1 HTTP/1.1\r\n"
        "Content-Length: %d\r\n"
        "Content-Type: multipart/form-data; "
        "boundary=%s\r\n\r\n"
        "%.*s", post_data_len, boundary,
        post_data_len, post_data)) != NULL);
    mg_free(file_data), mg_free(post_data);
    ASSERT(mg_read(conn, buf, sizeof(buf)) == (int) strlen(upload_ok_message));
    ASSERT(memcmp(buf, upload_ok_message, strlen(upload_ok_message)) == 0);
    mg_close_connection(conn);

    /* Upload two files */
    ASSERT((file_data = read_file("include/civetweb.h", &file_len)) != NULL);
    ASSERT((file2_data = read_file("README.md", &file2_len)) != NULL);
    post_data = NULL;
    post_data_len = alloc_printf(&post_data, 0,
        /* First file */
        "--%s\r\n"
        "Content-Disposition: form-data; "
        "name=\"file\"; "
        "filename=\"%s\"\r\n\r\n"
        "%.*s\r\n"

        /* Second file */
        "--%s\r\n"
        "Content-Disposition: form-data; "
        "name=\"file\"; "
        "filename=\"%s\"\r\n\r\n"
        "%.*s\r\n"

        /* Final boundary */
        "--%s--\r\n",
        boundary, upload_filename,
        file_len, file_data,
        boundary, upload_filename2,
        file2_len, file2_data,
        boundary);
    ASSERT(post_data_len > 0);
    ASSERT((conn = mg_download("localhost", atoi(HTTPS_PORT), 1,
        ebuf, sizeof(ebuf),
        "POST /upload?2 HTTP/1.1\r\n"
        "Content-Length: %d\r\n"
        "Content-Type: multipart/form-data; "
        "boundary=%s\r\n\r\n"
        "%.*s", post_data_len, boundary,
        post_data_len, post_data)) != NULL);
    mg_free(file_data), mg_free(file2_data), mg_free(post_data);
    ASSERT(mg_read(conn, buf, sizeof(buf)) == (int) strlen(upload_ok_message));
    ASSERT(memcmp(buf, upload_ok_message, strlen(upload_ok_message)) == 0);
    mg_close_connection(conn);
#endif

    mg_stop(ctx);
}

static void test_base64_encode(void) {
    const char *in[] = {"a", "ab", "abc", "abcd", NULL};
    const char *out[] = {"YQ==", "YWI=", "YWJj", "YWJjZA=="};
    char buf[100];
    int i;

    for (i = 0; in[i] != NULL; i++) {
        base64_encode((unsigned char *) in[i], strlen(in[i]), buf);
        ASSERT(!strcmp(buf, out[i]));
    }
}

static void test_mg_get_var(void) {
    static const char *post[] = {
        "a=1&&b=2&d&=&c=3%20&e=",
        "q=&st=2012%2F11%2F13+17%3A05&et=&team_id=",
        NULL
    };
    char buf[20];

    ASSERT(mg_get_var(post[0], strlen(post[0]), "a", buf, sizeof(buf)) == 1);
    ASSERT(buf[0] == '1' && buf[1] == '\0');
    ASSERT(mg_get_var(post[0], strlen(post[0]), "b", buf, sizeof(buf)) == 1);
    ASSERT(buf[0] == '2' && buf[1] == '\0');
    ASSERT(mg_get_var(post[0], strlen(post[0]), "c", buf, sizeof(buf)) == 2);
    ASSERT(buf[0] == '3' && buf[1] == ' ' && buf[2] == '\0');
    ASSERT(mg_get_var(post[0], strlen(post[0]), "e", buf, sizeof(buf)) == 0);
    ASSERT(buf[0] == '\0');

    ASSERT(mg_get_var(post[0], strlen(post[0]), "d", buf, sizeof(buf)) == -1);
    ASSERT(mg_get_var(post[0], strlen(post[0]), "c", buf, 2) == -2);

    ASSERT(mg_get_var(post[0], strlen(post[0]), "x", NULL, 10) == -2);
    ASSERT(mg_get_var(post[0], strlen(post[0]), "x", buf, 0) == -2);
    ASSERT(mg_get_var(post[1], strlen(post[1]), "st", buf, 16) == -2);
    ASSERT(mg_get_var(post[1], strlen(post[1]), "st", buf, 17) == 16);
}

static void test_set_throttle(void) {
    ASSERT(set_throttle(NULL, 0x0a000001, "/") == 0);
    ASSERT(set_throttle("10.0.0.0/8=20", 0x0a000001, "/") == 20);
    ASSERT(set_throttle("10.0.0.0/8=0.5k", 0x0a000001, "/") == 512);
    ASSERT(set_throttle("10.0.0.0/8=17m", 0x0a000001, "/") == 1048576 * 17);
    ASSERT(set_throttle("10.0.0.0/8=1x", 0x0a000001, "/") == 0);
    ASSERT(set_throttle("10.0.0.0/8=5,0.0.0.0/0=10", 0x0a000001, "/") == 10);
    ASSERT(set_throttle("10.0.0.0/8=5,/foo/**=7", 0x0a000001, "/index") == 5);
    ASSERT(set_throttle("10.0.0.0/8=5,/foo/**=7", 0x0a000001, "/foo/x") == 7);
    ASSERT(set_throttle("10.0.0.0/8=5,/foo/**=7", 0x0b000001, "/foxo/x") == 0);
    ASSERT(set_throttle("10.0.0.0/8=5,*=1", 0x0b000001, "/foxo/x") == 1);
}

static void test_next_option(void) {
    const char *p, *list = "x/8,/y**=1;2k,z";
    struct vec a, b;
    int i;

    ASSERT(next_option(NULL, &a, &b) == NULL);
    for (i = 0, p = list; (p = next_option(p, &a, &b)) != NULL; i++) {
        ASSERT(i != 0 || (a.ptr == list && a.len == 3 && b.len == 0));
        ASSERT(i != 1 || (a.ptr == list + 4 && a.len == 4 && b.ptr == list + 9 && b.len == 4));
        ASSERT(i != 2 || (a.ptr == list + 14 && a.len == 1 && b.len == 0));
    }
}

#if defined(USE_LUA)
static void check_lua_expr(lua_State *L, const char *expr, const char *value) {
    const char *v, *var_name = "myVar";
    char buf[100];

    snprintf(buf, sizeof(buf), "%s = %s", var_name, expr);
    (void) luaL_dostring(L, buf);
    lua_getglobal(L, var_name);
    v = lua_tostring(L, -1);
    ASSERT((value == NULL && v == NULL) || (value != NULL && v != NULL && !strcmp(value, v)));
}

static void test_lua(void) {
    static struct mg_connection conn;
    static struct mg_context ctx;

    char http_request[] = "POST /foo/bar HTTP/1.1\r\n"
        "Content-Length: 12\r\n"
        "Connection: close\r\n\r\nhello world!";
    lua_State *L = luaL_newstate();

    conn.ctx = &ctx;
    conn.buf = http_request;
    conn.buf_size = conn.data_len = strlen(http_request);
    conn.request_len = parse_http_message(conn.buf, conn.data_len, &conn.request_info);
    conn.content_len = conn.data_len - conn.request_len;

    prepare_lua_environment(&conn, L, "unit_test", LUA_ENV_TYPE_PLAIN_LUA_PAGE);
    ASSERT(lua_gettop(L) == 4);

    check_lua_expr(L, "'hi'", "hi");
    check_lua_expr(L, "mg.request_info.request_method", "POST");
    check_lua_expr(L, "mg.request_info.uri", "/foo/bar");
    check_lua_expr(L, "mg.request_info.num_headers", "2");
    check_lua_expr(L, "mg.request_info.remote_ip", "0");
    check_lua_expr(L, "mg.request_info.http_headers['Content-Length']", "12");
    check_lua_expr(L, "mg.request_info.http_headers['Connection']", "close");
    (void) luaL_dostring(L, "post = mg.read()");
    check_lua_expr(L, "# post", "12");
    check_lua_expr(L, "post", "hello world!");
    lua_close(L);
}
#endif

static void test_mg_stat(void) {
    static struct mg_context ctx;
    struct file file = STRUCT_FILE_INITIALIZER;
    ASSERT(!mg_stat(fc(&ctx), " does not exist ", &file));
}

static void test_skip_quoted(void) {
    char x[] = "a=1, b=2  c='hi \' there'", *s = x, *p;

    p = skip_quoted(&s, ", ", ", ", 0);
    ASSERT(p != NULL && !strcmp(p, "a=1"));

    p = skip_quoted(&s, ", ", ", ", 0);
    ASSERT(p != NULL && !strcmp(p, "b=2"));

    /* TODO(lsm): fix this */
#if 0
    p = skip_quoted(&s, "'", ", ", '\\');
    p = skip_quoted(&s, "'", ", ", '\\');
    printf("[%s]\n", p);
    ASSERT(p != NULL && !strcmp(p, "hi ' there"));
#endif
}

static void test_alloc_vprintf(void) {
    char buf[MG_BUF_LEN], *p = buf;

    ASSERT(alloc_printf(&p, sizeof(buf), "%s", "hi") == 2);
    ASSERT(p == buf);
    ASSERT(alloc_printf(&p, sizeof(buf), "%s", "") == 0);
    ASSERT(alloc_printf(&p, sizeof(buf), "") == 0);

    /* Pass small buffer, make sure alloc_printf allocates */
    ASSERT(alloc_printf(&p, 1, "%s", "hello") == 5);
    ASSERT(p != buf);
    mg_free(p);
}

static void test_request_replies(void) {
    char ebuf[100];
    int i;
    struct mg_connection *conn;
    struct mg_context *ctx;
    static struct { const char *request, *reply_regex; } tests[] = {
        {
            "GET hello.txt HTTP/1.0\r\nRange: bytes=3-5\r\n\r\n",
                "^HTTP/1.1 206 Partial Content"
        },
        {NULL, NULL},
    };

    ASSERT((ctx = mg_start(&CALLBACKS, NULL, OPTIONS)) != NULL);
    for (i = 0; tests[i].request != NULL; i++) {
        ASSERT((conn = mg_download("localhost", atoi(HTTP_PORT), 0, ebuf, sizeof(ebuf), "%s",
            tests[i].request)) != NULL);
        mg_close_connection(conn);
    }
    mg_stop(ctx);

/* TODO(bel):
    ASSERT((ctx = mg_start(&CALLBACKS, NULL, OPTIONS)) != NULL);
    for (i = 0; tests[i].request != NULL; i++) {
        ASSERT((conn = mg_download("localhost", atoi(HTTPS_PORT), 1, ebuf, sizeof(ebuf), "%s",
            tests[i].request)) != NULL);
        mg_close_connection(conn);
    }
    mg_stop(ctx);
*/
}

static int api_callback(struct mg_connection *conn) {
    struct mg_request_info *ri = mg_get_request_info(conn);
    char post_data[100] = "";

    ASSERT(ri->user_data == (void *) 123);
    ASSERT(ri->num_headers == 2);
    ASSERT(strcmp(mg_get_header(conn, "host"), "blah.com") == 0);
    ASSERT(mg_read(conn, post_data, sizeof(post_data)) == 3);
    ASSERT(memcmp(post_data, "b=1", 3) == 0);
    ASSERT(ri->query_string != NULL);
    ASSERT(ri->remote_ip > 0);
    ASSERT(ri->remote_port > 0);
    ASSERT(strcmp(ri->http_version, "1.0") == 0);

    mg_printf(conn, "HTTP/1.0 200 OK\r\n\r\n");
    return 1;
}

static void test_api_calls(void) {
    char ebuf[100];
    struct mg_callbacks callbacks;
    struct mg_connection *conn;
    struct mg_context *ctx;
    static const char *request = "POST /?a=%20&b=&c=xx HTTP/1.0\r\n"
        "Host:  blah.com\n"     /* More spaces before */
        "content-length: 3\r\n" /* Lower case header name */
        "\r\nb=123456";         /* Content size > content-length, test for mg_read() */

    memset(&callbacks, 0, sizeof(callbacks));
    callbacks.begin_request = api_callback;
    ASSERT((ctx = mg_start(&callbacks, (void *) 123, OPTIONS)) != NULL);
    ASSERT((conn = mg_download("localhost", atoi(HTTP_PORT), 0,
        ebuf, sizeof(ebuf), "%s", request)) != NULL);
    mg_close_connection(conn);
    mg_stop(ctx);
}

static void test_url_decode(void) {
    char buf[100];

    ASSERT(mg_url_decode("foo", 3, buf, 3, 0) == -1);  /* No space for \0 */
    ASSERT(mg_url_decode("foo", 3, buf, 4, 0) == 3);
    ASSERT(strcmp(buf, "foo") == 0);

    ASSERT(mg_url_decode("a+", 2, buf, sizeof(buf), 0) == 2);
    ASSERT(strcmp(buf, "a+") == 0);

    ASSERT(mg_url_decode("a+", 2, buf, sizeof(buf), 1) == 2);
    ASSERT(strcmp(buf, "a ") == 0);

    ASSERT(mg_url_decode("%61", 1, buf, sizeof(buf), 1) == 1);
    ASSERT(strcmp(buf, "%") == 0);

    ASSERT(mg_url_decode("%61", 2, buf, sizeof(buf), 1) == 2);
    ASSERT(strcmp(buf, "%6") == 0);

    ASSERT(mg_url_decode("%61", 3, buf, sizeof(buf), 1) == 1);
    ASSERT(strcmp(buf, "a") == 0);
}

static void test_mg_strcasestr(void) {
    static const char *big1 = "abcdef";
    ASSERT(mg_strcasestr("Y", "X") == NULL);
    ASSERT(mg_strcasestr("Y", "y") != NULL);
    ASSERT(mg_strcasestr(big1, "X") == NULL);
    ASSERT(mg_strcasestr(big1, "CD") == big1 + 2);
    ASSERT(mg_strcasestr("aa", "AAB") == NULL);
}

static void test_mg_get_cookie(void) {
    char buf[20];

    ASSERT(mg_get_cookie("", "foo", NULL, sizeof(buf)) == -2);
    ASSERT(mg_get_cookie("", "foo", buf, 0) == -2);
    ASSERT(mg_get_cookie("", "foo", buf, sizeof(buf)) == -1);
    ASSERT(mg_get_cookie("", NULL, buf, sizeof(buf)) == -1);
    ASSERT(mg_get_cookie("a=1; b=2; c; d", "a", buf, sizeof(buf)) == 1);
    ASSERT(strcmp(buf, "1") == 0);
    ASSERT(mg_get_cookie("a=1; b=2; c; d", "b", buf, sizeof(buf)) == 1);
    ASSERT(strcmp(buf, "2") == 0);
    ASSERT(mg_get_cookie("a=1; b=123", "b", buf, sizeof(buf)) == 3);
    ASSERT(strcmp(buf, "123") == 0);
    ASSERT(mg_get_cookie("a=1; b=2; c; d", "c", buf, sizeof(buf)) == -1);
}

static void test_strtoll(void) {
    ASSERT(strtoll("0", NULL, 10) == 0);
    ASSERT(strtoll("123", NULL, 10) == 123);
    ASSERT(strtoll("-34", NULL, 10) == -34);
    ASSERT(strtoll("3566626116", NULL, 10) == 3566626116);
}

static void test_parse_port_string(void) {
    static const char *valid[] = {
        "0", "1", "1s", "1r", "1.2.3.4:1", "1.2.3.4:1s", "1.2.3.4:1r",
#if defined(USE_IPV6)
        "[::1]:123", "[3ffe:2a00:100:7031::1]:900",
#endif
        NULL
    };
    static const char *invalid[] = {
        "99999", "1k", "1.2.3", "1.2.3.4:", "1.2.3.4:2p",
        NULL
    };
    struct socket so;
    struct vec vec;
    int i;

    for (i = 0; valid[i] != NULL; i++) {
        vec.ptr = valid[i];
        vec.len = strlen(vec.ptr);
        ASSERT(parse_port_string(&vec, &so) != 0);
    }

    for (i = 0; invalid[i] != NULL; i++) {
        vec.ptr = invalid[i];
        vec.len = strlen(vec.ptr);
        ASSERT(parse_port_string(&vec, &so) == 0);
    }
}

static void test_md5(void) {

    md5_state_t md5_state;
    unsigned char md5_val[16+1];
    char md5_str[32+1];
    const char *test_str = "The quick brown fox jumps over the lazy dog";

    md5_val[16]=0;
    md5_init(&md5_state);
    md5_finish(&md5_state, md5_val);
    ASSERT(strcmp(md5_val, "\xd4\x1d\x8c\xd9\x8f\x00\xb2\x04\xe9\x80\x09\x98\xec\xf8\x42\x7e")==0);
    sprintf(md5_str, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
        md5_val[0], md5_val[1], md5_val[2], md5_val[3],
        md5_val[4], md5_val[5], md5_val[6], md5_val[7],
        md5_val[8], md5_val[9], md5_val[10], md5_val[11],
        md5_val[12], md5_val[13], md5_val[14], md5_val[15]);
    ASSERT(strcmp(md5_str, "d41d8cd98f00b204e9800998ecf8427e")==0);

    mg_md5(md5_str, "", NULL);
    ASSERT(strcmp(md5_str, "d41d8cd98f00b204e9800998ecf8427e")==0);

    md5_init(&md5_state);
    md5_append(&md5_state, test_str, strlen(test_str));
    md5_finish(&md5_state, md5_val);
    sprintf(md5_str, "%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
        md5_val[0], md5_val[1], md5_val[2], md5_val[3],
        md5_val[4], md5_val[5], md5_val[6], md5_val[7],
        md5_val[8], md5_val[9], md5_val[10], md5_val[11],
        md5_val[12], md5_val[13], md5_val[14], md5_val[15]);
    ASSERT(strcmp(md5_str, "9e107d9d372bb6826bd81d3542a419d6")==0);

    mg_md5(md5_str, test_str, NULL);
    ASSERT(strcmp(md5_str, "9e107d9d372bb6826bd81d3542a419d6")==0);

    mg_md5(md5_str, "The", " ", "quick brown fox", "", " jumps ", "over the lazy dog", "", "", NULL);
    ASSERT(strcmp(md5_str, "9e107d9d372bb6826bd81d3542a419d6")==0);

    mg_md5(md5_str, "civetweb", NULL);
    ASSERT(strcmp(md5_str, "95c098bd85b619b24a83d9cea5e8ba54")==0);
}

int __cdecl main(void) {

    char buffer[512];
    FILE * f;
    struct mg_context *ctx;
    int i;

    /* print headline */
    printf("Civetweb %s unit test\n", mg_version());
#if defined(_WIN32)
    GetCurrentDirectoryA(sizeof(buffer), buffer);
#else
    getcwd(buffer, sizeof(buffer));
#endif
    printf("Test directory is \"%s\"\n", buffer); /* should be the "test" directory */
    f = fopen("hello.txt", "r");
    if (f) {
        fclose(f);
    } else {
        printf("Error: Test directory does not contain hello.txt\n");
    }
    f = fopen("unit_test.c", "r");
    if (f) {
        fclose(f);
    } else {
        printf("Error: Test directory does not contain unit_test.c\n");
    }

    /* test local functions */
    test_parse_port_string();
    test_mg_strcasestr();
    test_alloc_vprintf();
    test_base64_encode();
    test_match_prefix();
    test_remove_double_dots();
    test_should_keep_alive();
    test_parse_http_message();
    test_mg_get_var();
    test_set_throttle();
    test_next_option();
    test_mg_stat();
    test_skip_quoted();
    test_url_decode();
    test_mg_get_cookie();
    test_strtoll();
    test_md5();

    /* start stop server */
    ctx = mg_start(NULL, NULL, OPTIONS);
    ASSERT(ctx != NULL);
    mg_sleep(1000);
    mg_stop(ctx);

    /* create test data */
    fetch_data = (char *) mg_malloc(fetch_data_size);
    for (i=0; i<fetch_data_size; i++) {
        fetch_data[i] = 'a' + i%10;
    }

    /* tests with network access */
    test_mg_download(0);
#ifndef NO_SSL
    test_mg_download(1);
#endif
    test_mg_upload();
    test_request_replies();
    test_api_calls();

#if defined(USE_LUA)
    test_lua();
#endif

    /* test completed */
    mg_free(fetch_data);

    printf("TOTAL TESTS: %d, FAILED: %d\n", s_total_tests, s_failed_tests);
    return s_failed_tests == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}