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Added mg_connect(), mg_fetch() API functions. More tests added

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This commit is contained in:
Sergey Lyubka 2012-07-28 11:04:03 +01:00
parent da75a62a32
commit 6c54370aa1
4 changed files with 208 additions and 46 deletions
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131
mongoose.c
View File

@ -2622,26 +2622,43 @@ static int is_valid_http_method(const char *method) {
// Parse HTTP request, fill in mg_request_info structure.
// This function modifies the buffer with HTTP request by nul-terminating
// HTTP request components, header names and header values.
static int parse_http_request(char *buf, struct mg_request_info *ri) {
int status = 0;
static int parse_http_message(char *buf, int len, struct mg_request_info *ri) {
int request_length = get_request_len(buf, len);
if (request_length > 0) {
// Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
ri->remote_user = ri->request_method = ri->uri = ri->http_version;
ri->num_headers = 0;
ri->status_code = -1;
buf[request_length - 1] = '\0';
// RFC says that all initial whitespaces should be ingored
while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
buf++;
}
ri->request_method = skip(&buf, " ");
ri->uri = skip(&buf, " ");
ri->http_version = skip(&buf, "\r\n");
if (is_valid_http_method(ri->request_method) &&
strncmp(ri->http_version, "HTTP/", 5) == 0) {
ri->http_version += 5; // Skip "HTTP/"
parse_http_headers(&buf, ri);
status = 1;
}
return request_length;
}
return status;
static int parse_http_request(char *buf, int len, struct mg_request_info *ri) {
int result = parse_http_message(buf, len, ri);
if (result > 0 &&
is_valid_http_method(ri->request_method) &&
!strncmp(ri->http_version, "HTTP/", 5)) {
ri->http_version += 5; // Skip "HTTP/"
} else {
result = -1;
}
return result;
}
static int parse_http_response(char *buf, int len, struct mg_request_info *ri) {
int result = parse_http_message(buf, len, ri);
return result > 0 && !strncmp(ri->request_method, "HTTP/", 5) ? result : -1;
}
// Keep reading the input (either opened file descriptor fd, or socket sock,
@ -2659,7 +2676,7 @@ static int read_request(FILE *fp, SOCKET sock, SSL *ssl, char *buf, int bufsiz,
(n = pull(fp, sock, ssl, buf + *nread, bufsiz - *nread)) > 0) {
*nread += n;
}
} while (*nread < bufsiz && request_len == 0 && n > 0);
} while (*nread <= bufsiz && request_len == 0 && n > 0);
return request_len;
}
@ -3802,14 +3819,7 @@ static int set_acl_option(struct mg_context *ctx) {
}
static void reset_per_request_attributes(struct mg_connection *conn) {
struct mg_request_info *ri = &conn->request_info;
// Reset request info attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
ri->remote_user = ri->request_method = ri->uri = ri->http_version =
conn->path_info = NULL;
ri->num_headers = 0;
ri->status_code = -1;
conn->num_bytes_sent = conn->consumed_content = 0;
conn->content_len = -1;
conn->request_len = conn->data_len = 0;
@ -3855,6 +3865,88 @@ static void close_connection(struct mg_connection *conn) {
}
}
struct mg_connection *mg_connect(struct mg_context *ctx,
const char *host, int port, int use_ssl) {
struct mg_connection *newconn = NULL;
struct sockaddr_in sin;
struct hostent *he;
int sock;
if (ctx->ssl_ctx == NULL && use_ssl) {
cry(fc(ctx), "%s: SSL is not initialized", __func__);
} else if ((he = gethostbyname(host)) == NULL) {
cry(fc(ctx), "%s: gethostbyname(%s): %s", __func__, host, strerror(ERRNO));
} else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
cry(fc(ctx), "%s: socket: %s", __func__, strerror(ERRNO));
} else {
sin.sin_family = AF_INET;
sin.sin_port = htons((uint16_t) port);
sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
cry(fc(ctx), "%s: connect(%s:%d): %s", __func__, host, port,
strerror(ERRNO));
closesocket(sock);
} else if ((newconn = (struct mg_connection *)
calloc(1, sizeof(*newconn))) == NULL) {
cry(fc(ctx), "%s: calloc: %s", __func__, strerror(ERRNO));
closesocket(sock);
} else {
newconn->client.sock = sock;
newconn->client.rsa.sin = sin;
newconn->client.is_ssl = use_ssl;
if (use_ssl) {
sslize(newconn, SSL_connect);
}
}
}
return newconn;
}
FILE *mg_fetch(struct mg_context *ctx, const char *url, const char *path,
struct mg_request_info *ri) {
struct mg_connection *newconn;
int n, req_length, data_length = 0, port = 80;
char host[1025], proto[10], buf[16384];
FILE *fp = NULL;
if (sscanf(url, "%9[htps]://%1024[^:]:%d/%n", proto, host, &port, &n) != 3 &&
sscanf(url, "%9[htps]://%1024[^/]/%n", proto, host, &n) != 2) {
cry(fc(ctx), "%s: invalid URL: [%s]", __func__, url);
} else if ((newconn = mg_connect(ctx, host, port,
!strcmp(proto, "https"))) == NULL) {
cry(fc(ctx), "%s: mg_connect(%s): %s", __func__, url, strerror(ERRNO));
} else {
mg_printf(newconn, "GET /%s HTTP/1.0\r\n\r\n", url + n);
req_length = read_request(NULL, newconn->client.sock,
newconn->ssl, buf, sizeof(buf), &data_length);
if (req_length <= 0) {
cry(fc(ctx), "%s(%s): invalid HTTP reply", __func__, url);
} else if (parse_http_response(buf, req_length, ri) <= 0) {
cry(fc(ctx), "%s(%s): cannot parse HTTP headers", __func__, url);
} else if ((fp = fopen(path, "w+b")) == NULL) {
cry(fc(ctx), "%s: fopen(%s): %s", __func__, path, strerror(ERRNO));
} else {
data_length -= req_length;
memmove(buf, buf + req_length, data_length);
do {
if (fwrite(buf, 1, data_length, fp) != (size_t) data_length) {
fclose(fp);
fp = NULL;
break;
}
data_length = mg_read(newconn, buf, sizeof(buf));
} while (data_length > 0);
}
close_connection(newconn);
free(newconn);
}
return fp;
}
static void discard_current_request_from_buffer(struct mg_connection *conn) {
char *buffered;
int buffered_len, body_len;
@ -3903,9 +3995,8 @@ static void process_new_connection(struct mg_connection *conn) {
return; // Remote end closed the connection
}
// Nul-terminate the request cause parse_http_request() uses sscanf
conn->buf[conn->request_len - 1] = '\0';
if (!parse_http_request(conn->buf, ri) || !is_valid_uri(ri->uri)) {
if (parse_http_request(conn->buf, conn->buf_size, ri) <= 0 ||
!is_valid_uri(ri->uri)) {
// Do not put garbage in the access log, just send it back to the client
send_http_error(conn, 400, "Bad Request",
"Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);

20
mongoose.h
View File

@ -218,6 +218,26 @@ int mg_get_cookie(const struct mg_connection *,
const char *cookie_name, char *buf, size_t buf_len);
// Connect to the remote web server.
// Return:
// On success, valid pointer to the new connection
// On error, NULL
struct mg_connection *mg_connect(struct mg_context *ctx,
const char *host, int port, int use_ssl);
// Download given URL to a given file.
// url: URL to download
// path: file name where to save the data
// request_info: pointer to a structure that will hold parsed reply headers
// Return:
// On success, opened file stream to the downloaded contents. The stream
// is positioned to the end of the file.
// On error, NULL
FILE *mg_fetch(struct mg_context *ctx, const char *url, const char *path,
struct mg_request_info *request_info);
// Return Mongoose version.
const char *mg_version(void);

14
test/test.pl
View File

@ -85,7 +85,8 @@ sub o {
if ($reply =~ /$expected_reply/s) {
print "OK\n";
} else {
fail("Requested: [$request]\nExpected: [$expected_reply], got: [$reply]");
#fail("Requested: [$request]\nExpected: [$expected_reply], got: [$reply]");
fail("Expected: [$expected_reply], got: [$reply]");
}
}
@ -177,6 +178,11 @@ my $cmd = "$exe ".
$cmd .= ' -cgi_interpreter perl' if on_windows();
spawn($cmd);
my $x = 'x=' . 'A' x (200 * 1024);
my $len = length($x);
o("POST /env.cgi HTTP/1.0\r\nContent-Length: $len\r\n\r\n$x",
'^HTTP/1.1 200 OK', 'Long POST');
# Try to overflow: Send very long request
req('POST ' . '/..' x 100 . 'ABCD' x 3000 . "\n\n", 0); # don't log this one
@ -339,10 +345,6 @@ unless (scalar(@ARGV) > 0 and $ARGV[0] eq "basic_tests") {
o("GET /hello.txt HTTP/1.0\nAuthorization: $auth_header\n\n", 'HTTP/1.1 200 OK', 'GET regular file with auth');
unlink "$root/.htpasswd";
my $x = 'x=' . 'A' x (200 * 1024);
my $len = length($x);
o("POST /env.cgi HTTP/1.0\r\nContent-Length: $len\r\n\r\n$x",
'^HTTP/1.1 200 OK', 'Long POST');
o("GET /env.cgi HTTP/1.0\n\r\n", 'HTTP/1.1 200 OK', 'GET CGI file');
o("GET /bad2.cgi HTTP/1.0\n\n", "HTTP/1.1 123 Please pass me to the client\r",
@ -443,7 +445,7 @@ sub do_PUT_test {
}
sub do_unit_test {
my $cmd = "cc -W -Wall -o $unit_test_exe $root/unit_test.c -I. ".
my $cmd = "cc -g -W -Wall -o $unit_test_exe $root/unit_test.c -I. ".
"-pthread -DNO_SSL ";
if (on_windows()) {
$cmd = "cl $root/embed.c mongoose.c /I. /nologo /DNO_SSL ".

75
test/unit_test.c
View File

@ -13,25 +13,21 @@ static void test_parse_http_request() {
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";
ASSERT(parse_http_request(req1, &ri) == 1);
ASSERT(parse_http_request(req1, sizeof(req1), &ri) == sizeof(req1) - 1);
ASSERT(strcmp(ri.http_version, "1.1") == 0);
ASSERT(ri.num_headers == 0);
ASSERT(parse_http_request(req2, &ri) == 0);
// TODO(lsm): Fix this. Bah is not a valid header.
ASSERT(parse_http_request(req3, &ri) == 1);
ASSERT(ri.num_headers == 1);
ASSERT(strcmp(ri.http_headers[0].name, "Bah\r\n") == 0);
ASSERT(parse_http_request(req2, sizeof(req2), &ri) == -1);
ASSERT(parse_http_request(req3, sizeof(req3), &ri) == -1);
// TODO(lsm): Fix this. Header value may span multiple lines.
ASSERT(parse_http_request(req4, &ri) == 1);
ASSERT(parse_http_request(req4, sizeof(req4), &ri) == sizeof(req4) - 1);
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\n") == 0);
ASSERT(strcmp(ri.http_headers[2].name, "baz\r\n\r") == 0);
ASSERT(strcmp(ri.http_headers[2].value, "") == 0);
// TODO(lsm): add more tests.
@ -47,7 +43,7 @@ static void test_should_keep_alive(void) {
memset(&conn, 0, sizeof(conn));
conn.ctx = &ctx;
parse_http_request(req1, &conn.request_info);
parse_http_request(req1, sizeof(req1), &conn.request_info);
ctx.config[ENABLE_KEEP_ALIVE] = "no";
ASSERT(should_keep_alive(&conn) == 0);
@ -59,13 +55,13 @@ static void test_should_keep_alive(void) {
ASSERT(should_keep_alive(&conn) == 0);
conn.must_close = 0;
parse_http_request(req2, &conn.request_info);
parse_http_request(req2, sizeof(req2), &conn.request_info);
ASSERT(should_keep_alive(&conn) == 0);
parse_http_request(req3, &conn.request_info);
parse_http_request(req3, sizeof(req3), &conn.request_info);
ASSERT(should_keep_alive(&conn) == 0);
parse_http_request(req4, &conn.request_info);
parse_http_request(req4, sizeof(req4), &conn.request_info);
ASSERT(should_keep_alive(&conn) == 1);
conn.request_info.status_code = 401;
@ -131,10 +127,63 @@ static void test_remove_double_dots() {
}
}
static const char *fetch_data = "hello world!\n";
static void *event_handler(enum mg_event event,
struct mg_connection *conn,
const struct mg_request_info *request_info) {
if (event == MG_NEW_REQUEST && !strcmp(request_info->uri, "/data")) {
mg_printf(conn, "HTTP/1.1 200 OK\r\n"
"Content-Length: %d\r\n\r\n"
"%s", (int) strlen(fetch_data), fetch_data);
return "";
} else if (event == MG_EVENT_LOG) {
printf("%s\n", request_info->log_message);
}
return NULL;
}
static void test_mg_fetch(void) {
static const char *options[] = {
"document_root", ".",
"listening_ports", "33796",
NULL,
};
char buf[1000];
int length;
struct mg_context *ctx;
struct mg_request_info ri;
const char *tmp_file = "temporary_file_name_for_unit_test.txt";
FILE *fp;
ASSERT((ctx = mg_start(event_handler, NULL, options)) != NULL);
// Failed fetch, pass invalid URL
ASSERT(mg_fetch(ctx, "localhost", tmp_file, &ri) == NULL);
ASSERT(mg_fetch(ctx, "localhost:33796", tmp_file, &ri) == NULL);
ASSERT(mg_fetch(ctx, "http://$$$.$$$", tmp_file, &ri) == NULL);
// Failed fetch, pass invalid file name
ASSERT(mg_fetch(ctx, "http://localhost:33796/data",
"/this/file/must/not/exist/ever", &ri) == NULL);
// Successful fetch
ASSERT((fp = mg_fetch(ctx, "http://localhost:33796/data",
tmp_file, &ri)) != NULL);
ASSERT((length = ftell(fp)) == (int) strlen(fetch_data));
fseek(fp, 0, SEEK_SET);
ASSERT(fread(buf, 1, length, fp) == length);
ASSERT(memcmp(buf, fetch_data, length) == 0);
remove(tmp_file);
mg_stop(ctx);
}
int main(void) {
test_match_prefix();
test_remove_double_dots();
test_should_keep_alive();
test_parse_http_request();
test_mg_fetch();
return 0;
}