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Single exit point and common cleanup code in gethttp

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* src/http.c (gethttp): Common cleanup for type, message,
  req, resp, head.  Single exit point.
This commit is contained in:
Hubert Tarasiuk 2015-04-06 12:12:45 +02:00 committed by Tim Rühsen
parent bebe462a67
commit 566696cb82
1 changed files with 71 additions and 82 deletions
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153
src/http.c
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@ -2387,9 +2387,9 @@ static uerr_t
gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
struct iri *iri, int count)
{
struct request *req;
struct request *req = NULL;
char *type;
char *type = NULL;
char *user, *passwd;
char *proxyauth;
int statcode;
@ -2398,6 +2398,7 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
struct url *conn;
FILE *fp;
int err;
uerr_t retval;
int sock = -1;
@ -2420,10 +2421,10 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
POST). */
bool head_only = !!(*dt & HEAD_ONLY);
char *head;
struct response *resp;
char *head = NULL;
struct response *resp = NULL;
char hdrval[512];
char *message;
char *message = NULL;
/* Declare WARC variables. */
bool warc_enabled = (opt.warc_filename != NULL);
@ -2457,7 +2458,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
scheme_disable (SCHEME_HTTPS);
logprintf (LOG_NOTQUIET,
_("Disabling SSL due to encountered errors.\n"));
return SSLINITFAILED;
retval = SSLINITFAILED;
goto cleanup;
}
}
#endif /* HAVE_SSL */
@ -2480,7 +2482,10 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
&basic_auth_finished, &body_data_size,
&user, &passwd, &ret);
if (req == NULL)
return ret;
{
retval = ret;
goto cleanup;
}
}
retry_with_auth:
/* We need to come back here when the initial attempt to retrieve
@ -2524,8 +2529,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
&using_ssl, inhibit_keep_alive, &sock);
if (err != RETROK)
{
request_free (&req);
return err;
retval = err;
goto cleanup;
}
}
@ -2537,8 +2542,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (warc_tmp == NULL)
{
CLOSE_INVALIDATE (sock);
request_free (&req);
return WARC_TMP_FOPENERR;
retval = WARC_TMP_FOPENERR;
goto cleanup;
}
if (! proxy)
@ -2583,15 +2588,15 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (write_error < 0)
{
CLOSE_INVALIDATE (sock);
request_free (&req);
if (warc_tmp != NULL)
fclose (warc_tmp);
if (write_error == -2)
return WARC_TMP_FWRITEERR;
retval = WARC_TMP_FWRITEERR;
else
return WRITEFAILED;
retval = WRITEFAILED;
goto cleanup;
}
logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
proxy ? "Proxy" : "HTTP");
@ -2615,8 +2620,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (! warc_result)
{
CLOSE_INVALIDATE (sock);
request_free (&req);
return WARC_ERR;
retval = WARC_ERR;
goto cleanup;
}
/* warc_write_request_record has also closed warc_tmp. */
@ -2635,17 +2640,16 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
{
logputs (LOG_NOTQUIET, _("No data received.\n"));
CLOSE_INVALIDATE (sock);
request_free (&req);
return HEOF;
retval = HEOF;
}
else
{
logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
fd_errstr (sock));
CLOSE_INVALIDATE (sock);
request_free (&req);
return HERR;
retval = HERR;
}
goto cleanup;
}
DEBUGP (("\n---response begin---\n%s---response end---\n", head));
@ -2662,10 +2666,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
quotearg_style (escape_quoting_style,
_("Malformed status line")));
CLOSE_INVALIDATE (sock);
resp_free (&resp);
request_free (&req);
xfree (head);
return HERR;
retval = HERR;
goto cleanup;
}
if (H_10X (statcode))
@ -2778,11 +2780,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (_err != RETRFINISHED || hs->res < 0)
{
CLOSE_INVALIDATE (sock);
request_free (&req);
xfree (message);
resp_free (&resp);
xfree (head);
return _err;
retval = _err;
goto cleanup;
}
else
CLOSE_FINISH (sock);
@ -2813,14 +2812,11 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
goto retry_with_auth;
}
}
request_free (&req);
xfree (message);
resp_free (&resp);
xfree (head);
if (auth_err == RETROK)
return AUTHFAILED;
retval = AUTHFAILED;
else
return auth_err;
retval = auth_err;
goto cleanup;
}
else /* statcode != HTTP_STATUS_UNAUTHORIZED */
{
@ -2836,13 +2832,10 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
hs->restval = 0;
CLOSE_FINISH (sock);
request_free (&req);
xfree (hs->message);
xfree (message);
resp_free (&resp);
xfree (head);
return GATEWAYTIMEOUT;
retval = GATEWAYTIMEOUT;
goto cleanup;
}
@ -2850,14 +2843,10 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
uerr_t ret = check_file_output (u, hs, resp, hdrval, sizeof hdrval);
if (ret != RETROK)
{
request_free (&req);
resp_free (&resp);
xfree (head);
xfree (message);
return ret;
retval = ret;
goto cleanup;
}
}
request_free (&req);
hs->statcode = statcode;
if (statcode == -1)
@ -2866,7 +2855,6 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
hs->error = xstrdup (_("(no description)"));
else
hs->error = xstrdup (message);
xfree (message);
type = resp_header_strdup (resp, "Content-Type");
if (type)
@ -2904,7 +2892,6 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
contlen = last_byte_pos - first_byte_pos + 1;
}
}
resp_free (&resp);
/* 20x responses are counted among successful by default. */
if (H_20X (statcode))
@ -2920,10 +2907,9 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
hs->restval = 0;
CLOSE_FINISH (sock);
xfree (type);
xfree (head);
return RETRFINISHED;
retval = RETRFINISHED;
goto cleanup;
}
/* Return if redirected. */
@ -2961,9 +2947,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (_err != RETRFINISHED || hs->res < 0)
{
CLOSE_INVALIDATE (sock);
xfree (type);
xfree (head);
return _err;
retval = _err;
goto cleanup;
}
else
CLOSE_FINISH (sock);
@ -2978,8 +2963,6 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
CLOSE_INVALIDATE (sock);
}
xfree (type);
xfree (head);
/* From RFC2616: The status codes 303 and 307 have
been added for servers that wish to make unambiguously
clear which kind of reaction is expected of the client.
@ -2998,19 +2981,25 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
switch (statcode)
{
case HTTP_STATUS_TEMPORARY_REDIRECT:
return NEWLOCATION_KEEP_POST;
retval = NEWLOCATION_KEEP_POST;
goto cleanup;
case HTTP_STATUS_MOVED_PERMANENTLY:
if (opt.method && c_strcasecmp (opt.method, "post") != 0)
return NEWLOCATION_KEEP_POST;
{
retval = NEWLOCATION_KEEP_POST;
goto cleanup;
}
break;
case HTTP_STATUS_MOVED_TEMPORARILY:
if (opt.method && c_strcasecmp (opt.method, "post") != 0)
return NEWLOCATION_KEEP_POST;
{
retval = NEWLOCATION_KEEP_POST;
goto cleanup;
}
break;
default:
return NEWLOCATION;
}
return NEWLOCATION;
retval = NEWLOCATION;
goto cleanup;
}
}
@ -3047,24 +3036,22 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
hs->res = 0;
/* Mark as successfully retrieved. */
*dt |= RETROKF;
xfree (type);
if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE)
CLOSE_FINISH (sock);
else
CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
might be more bytes in the body. */
xfree (head);
return RETRUNNEEDED;
retval = RETRUNNEEDED;
goto cleanup;
}
if ((contrange != 0 && contrange != hs->restval)
|| (H_PARTIAL (statcode) && !contrange))
{
/* The Range request was somehow misunderstood by the server.
Bail out. */
xfree (type);
CLOSE_INVALIDATE (sock);
xfree (head);
return RANGEERR;
retval = RANGEERR;
goto cleanup;
}
if (contlen == -1)
hs->contlen = -1;
@ -3127,9 +3114,8 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (_err != RETRFINISHED || hs->res < 0)
{
CLOSE_INVALIDATE (sock);
xfree (head);
xfree (type);
return _err;
retval = _err;
goto cleanup;
}
else
CLOSE_FINISH (sock);
@ -3152,18 +3138,16 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
CLOSE_INVALIDATE (sock);
}
xfree (head);
xfree (type);
return RETRFINISHED;
retval = RETRFINISHED;
goto cleanup;
}
err = open_output_stream (hs, count, &fp);
if (err != RETROK)
{
xfree (type);
xfree (head);
CLOSE_INVALIDATE (sock);
return err;
retval = err;
goto cleanup;
}
err = read_response_body (hs, sock, fp, contlen, contrange,
@ -3172,10 +3156,6 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
warc_request_uuid, warc_ip, type,
statcode, head);
/* Now we no longer need to store the response header. */
xfree (head);
xfree (type);
if (hs->res >= 0)
CLOSE_FINISH (sock);
else
@ -3184,7 +3164,16 @@ gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
if (!output_stream)
fclose (fp);
return err;
retval = err;
cleanup:
xfree (head);
xfree (type);
xfree (message);
resp_free (&resp);
request_free (&req);
return retval;
}
/* The genuine HTTP loop! This is the part where the retrieval is