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HTTP: stop parsing headers when switching to unknown protocols

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- unknown protocols probably won't send more headers (e.g. WebSocket)
- improved comments and moved them to the correct case statements

Closes #899
This commit is contained in:
Michael Kaufmann 2016-06-28 10:57:30 +02:00 committed by Daniel Stenberg
parent 9cb851e371
commit 7bda07b046
1 changed files with 23 additions and 10 deletions
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33
lib/http.c
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@ -3054,19 +3054,19 @@ CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
#endif /* CURL_DOES_CONVERSIONS */
if(100 <= k->httpcode && 199 >= k->httpcode) {
/*
* We have made a HTTP PUT or POST and this is 1.1-lingo
* that tells us that the server is OK with this and ready
* to receive the data.
* However, we'll get more headers now so we must get
* back into the header-parsing state!
*/
k->header = TRUE;
k->headerline = 0; /* restart the header line counter */
/* "A user agent MAY ignore unexpected 1xx status responses." */
switch(k->httpcode) {
case 100:
/*
* We have made a HTTP PUT or POST and this is 1.1-lingo
* that tells us that the server is OK with this and ready
* to receive the data.
* However, we'll get more headers now so we must get
* back into the header-parsing state!
*/
k->header = TRUE;
k->headerline = 0; /* restart the header line counter */
/* if we did wait for this do enable write now! */
if(k->exp100 > EXP100_SEND_DATA) {
k->exp100 = EXP100_SEND_DATA;
@ -3076,9 +3076,14 @@ CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
case 101:
/* Switching Protocols */
if(k->upgr101 == UPGR101_REQUESTED) {
/* Switching to HTTP/2 */
infof(data, "Received 101\n");
k->upgr101 = UPGR101_RECEIVED;
/* we'll get more headers (HTTP/2 response) */
k->header = TRUE;
k->headerline = 0; /* restart the header line counter */
/* switch to http2 now. The bytes after response headers
are also processed here, otherwise they are lost. */
result = Curl_http2_switched(conn, k->str, *nread);
@ -3086,8 +3091,16 @@ CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
return result;
*nread = 0;
}
else {
/* Switching to another protocol (e.g. WebSocket) */
k->header = FALSE; /* no more header to parse! */
}
break;
default:
/* the status code 1xx indicates a provisional response, so
we'll get another set of headers */
k->header = TRUE;
k->headerline = 0; /* restart the header line counter */
break;
}
}