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Add extra headers param to mg_ws_upgrade()

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This commit is contained in:
cpq 2021-01-16 22:48:43 +00:00
parent 72d3a49352
commit ae6fd6aa35
8 changed files with 49 additions and 28 deletions
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7
docs/README.md
View File

@ -806,10 +806,13 @@ Create client Websocket connection.
### mg\_ws\_upgrade()
```c
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *);
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
const char *fmt, ...);
```
Upgrade given HTTP connection to Websocket.
Upgrade given HTTP connection to Websocket. The `fmt` is a printf-like
format string for the extra HTTP headers returned to the client in a
Websocket handshake. Set `fmt` to `NULL` if no extra headers needs to be passed.
### mg\_ws\_send()

2
examples/timers/main.c
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@ -18,7 +18,7 @@ static const char *s_listen_on = "http://localhost:8000";
static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
if (ev == MG_EV_HTTP_MSG) {
struct mg_http_message *hm = (struct mg_http_message *) ev_data;
mg_ws_upgrade(c, hm);
mg_ws_upgrade(c, hm, NULL);
} else if (ev == MG_EV_WS_MSG) {
// Got websocket frame. Received data is wm->data. Echo it back!
struct mg_ws_message *wm = (struct mg_ws_message *) ev_data;

2
examples/websocket-server/main.c
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@ -21,7 +21,7 @@ static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
if (mg_http_match_uri(hm, "/websocket")) {
// Upgrade to websocket. From now on, a connection is a full-duplex
// Websocket connection, which will receive MG_EV_WS_MSG events.
mg_ws_upgrade(c, hm);
mg_ws_upgrade(c, hm, NULL);
} else if (mg_http_match_uri(hm, "/rest")) {
// Serve REST response
mg_http_reply(c, 200, "", "{\"result\": %d}\n", 123);

26
mongoose.c
View File

@ -3967,25 +3967,27 @@ struct ws_msg {
};
static void ws_handshake(struct mg_connection *c, const char *key,
size_t key_len) {
size_t key_len, const char *fmt, va_list ap) {
const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
unsigned char sha[20], b64_sha[30];
// mem[256], *buf = mem;
// int len = 0;
char mem[128], *buf = mem;
mg_sha1_ctx sha_ctx;
mg_sha1_init(&sha_ctx);
mg_sha1_update(&sha_ctx, (unsigned char *) key, key_len);
mg_sha1_update(&sha_ctx, (unsigned char *) magic, 36);
mg_sha1_final(sha, &sha_ctx);
mg_base64_encode(sha, sizeof(sha), (char *) b64_sha);
buf[0] = '\0';
if (fmt != NULL) mg_vasprintf(&buf, sizeof(mem), fmt, ap);
mg_printf(c,
"HTTP/1.1 101 Switching Protocols\r\n"
"Upgrade: websocket\r\n"
"Connection: Upgrade\r\n"
"Sec-WebSocket-Accept: %s\r\n\r\n",
b64_sha);
// mg_send(c, buf, len);
// if (buf != mem) free(buf);
"Sec-WebSocket-Accept: %s\r\n"
"%s\r\n",
b64_sha, buf);
if (buf != mem) free(buf);
}
static size_t ws_process(uint8_t *buf, size_t len, struct ws_msg *msg) {
@ -4145,9 +4147,15 @@ struct mg_connection *mg_ws_connect(struct mg_mgr *mgr, const char *url,
return c;
}
void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm) {
void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm,
const char *fmt, ...) {
struct mg_str *wskey = mg_http_get_header(hm, "Sec-WebSocket-Key");
c->pfn = mg_ws_cb;
if (wskey != NULL) ws_handshake(c, wskey->ptr, wskey->len);
if (wskey != NULL) {
va_list ap;
va_start(ap, fmt);
ws_handshake(c, wskey->ptr, wskey->len, fmt, ap);
va_end(ap);
}
c->is_websocket = 1;
}

3
mongoose.h
View File

@ -740,7 +740,8 @@ struct mg_ws_message {
struct mg_connection *mg_ws_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data,
const char *fmt, ...);
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *);
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
const char *fmt, ...);
size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);

26
src/ws.c
View File

@ -15,25 +15,27 @@ struct ws_msg {
};
static void ws_handshake(struct mg_connection *c, const char *key,
size_t key_len) {
size_t key_len, const char *fmt, va_list ap) {
const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
unsigned char sha[20], b64_sha[30];
// mem[256], *buf = mem;
// int len = 0;
char mem[128], *buf = mem;
mg_sha1_ctx sha_ctx;
mg_sha1_init(&sha_ctx);
mg_sha1_update(&sha_ctx, (unsigned char *) key, key_len);
mg_sha1_update(&sha_ctx, (unsigned char *) magic, 36);
mg_sha1_final(sha, &sha_ctx);
mg_base64_encode(sha, sizeof(sha), (char *) b64_sha);
buf[0] = '\0';
if (fmt != NULL) mg_vasprintf(&buf, sizeof(mem), fmt, ap);
mg_printf(c,
"HTTP/1.1 101 Switching Protocols\r\n"
"Upgrade: websocket\r\n"
"Connection: Upgrade\r\n"
"Sec-WebSocket-Accept: %s\r\n\r\n",
b64_sha);
// mg_send(c, buf, len);
// if (buf != mem) free(buf);
"Sec-WebSocket-Accept: %s\r\n"
"%s\r\n",
b64_sha, buf);
if (buf != mem) free(buf);
}
static size_t ws_process(uint8_t *buf, size_t len, struct ws_msg *msg) {
@ -193,9 +195,15 @@ struct mg_connection *mg_ws_connect(struct mg_mgr *mgr, const char *url,
return c;
}
void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm) {
void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm,
const char *fmt, ...) {
struct mg_str *wskey = mg_http_get_header(hm, "Sec-WebSocket-Key");
c->pfn = mg_ws_cb;
if (wskey != NULL) ws_handshake(c, wskey->ptr, wskey->len);
if (wskey != NULL) {
va_list ap;
va_start(ap, fmt);
ws_handshake(c, wskey->ptr, wskey->len, fmt, ap);
va_end(ap);
}
c->is_websocket = 1;
}

3
src/ws.h
View File

@ -20,5 +20,6 @@ struct mg_ws_message {
struct mg_connection *mg_ws_connect(struct mg_mgr *, const char *url,
mg_event_handler_t fn, void *fn_data,
const char *fmt, ...);
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *);
void mg_ws_upgrade(struct mg_connection *, struct mg_http_message *,
const char *fmt, ...);
size_t mg_ws_send(struct mg_connection *, const char *buf, size_t len, int op);

2
test/unit_test.c
View File

@ -331,7 +331,7 @@ static void eh1(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
if (mg_http_match_uri(hm, "/foo/*")) {
mg_http_reply(c, 200, "", "uri: %.*s", hm->uri.len - 5, hm->uri.ptr + 5);
} else if (mg_http_match_uri(hm, "/ws")) {
mg_ws_upgrade(c, hm);
mg_ws_upgrade(c, hm, NULL);
} else if (mg_http_match_uri(hm, "/body")) {
mg_http_reply(c, 200, "", "%.*s", (int) hm->body.len, hm->body.ptr);
} else if (mg_http_match_uri(hm, "/bar")) {