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Use helper functions to send common HTTP headers/responses

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Factor out duplicated code in the AnyConnect compatibility handlers.
This commit is contained in:
Kevin Cernekee
2016-01-26 22:47:51 -08:00
committed by Nikos Mavrogiannopoulos
parent b3c9da4ce1
commit 8bf668c0f7
1 changed files with 39 additions and 143 deletions
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182
src/worker-http-handlers.c
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@@ -40,12 +40,35 @@
#include <tlslib.h>
#ifdef ANYCONNECT_CLIENT_COMPAT
const char empty_msg[] = "<html></html>\n";
static int send_headers(worker_st *ws, unsigned http_ver, const char *content_type,
unsigned content_length)
{
if (cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver) < 0 ||
cstp_puts (ws, "Connection: Keep-Alive\r\n") < 0 ||
cstp_printf(ws, "Content-Type: %s\r\n", content_type) < 0 ||
cstp_puts (ws, "X-Transcend-Version: 1\r\n") < 0 ||
cstp_printf(ws, "Content-Length: %u\r\n", content_length) < 0 ||
cstp_puts (ws, "\r\n") < 0)
return -1;
return 0;
}
static int send_string(worker_st *ws, unsigned http_ver, const char *content_type,
const char *data, int content_length)
{
/* don't bother uncorking on error - the connection will be closed anyway */
cstp_cork(ws);
if (send_headers(ws, http_ver, content_type, content_length) < 0 ||
cstp_send(ws, data, content_length) < 0 ||
cstp_uncork(ws) < 0)
return -1;
return 0;
}
int get_config_handler(worker_st *ws, unsigned http_ver)
{
int ret;
struct stat st;
int ret;
struct stat st;
oclog(ws, LOG_HTTP_DEBUG, "requested config: %s", ws->req.url);
@@ -57,7 +80,7 @@ struct stat st;
return -1;
}
ret = stat( ws->user_config->xml_config_file, &st);
ret = stat(ws->user_config->xml_config_file, &st);
if (ret == -1) {
oclog(ws, LOG_INFO, "cannot load config file '%s'", ws->user_config->xml_config_file);
cstp_printf(ws, "HTTP/1.%u 404 Not found\r\n", http_ver);
@@ -65,32 +88,8 @@ struct stat st;
}
cstp_cork(ws);
ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Content-Type: text/xml\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
if (ret < 0)
return -1;
ret = cstp_printf(ws, "Content-Length: %u\r\n", (unsigned)st.st_size);
if (ret < 0)
return -1;
ret = cstp_puts(ws, "\r\n");
if (ret < 0)
return -1;
ret = cstp_uncork(ws);
if (ret < 0)
if (send_headers(ws, http_ver, "text/xml", (unsigned)st.st_size) < 0 ||
cstp_uncork(ws) < 0)
return -1;
ret = cstp_send_file(ws, ws->user_config->xml_config_file);
@@ -107,49 +106,14 @@ struct stat st;
int get_string_handler(worker_st *ws, unsigned http_ver)
{
int ret;
const char *data;
int len;
oclog(ws, LOG_HTTP_DEBUG, "requested fixed string: %s", ws->req.url);
if (!strcmp(ws->req.url, "/1/binaries/update.txt")) {
data = VPN_VERSION;
len = sizeof(VPN_VERSION)-1;
return send_string(ws, http_ver, "text/xml", VPN_VERSION,
sizeof(VPN_VERSION) - 1);
} else {
data = XML_START;
len = sizeof(XML_START)-1;
return send_string(ws, http_ver, "text/xml", XML_START,
sizeof(XML_START) - 1);
}
cstp_cork(ws);
ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Content-Type: text/xml\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
if (ret < 0)
return -1;
ret = cstp_printf(ws, "Content-Length: %d\r\n\r\n", len);
if (ret < 0)
return -1;
ret = cstp_send(ws, data, len);
if (ret < 0)
return -1;
ret = cstp_uncork(ws);
if (ret < 0)
return -1;
return 0;
}
#define SH_SCRIPT "#!/bin/sh\n\n" \
@@ -157,85 +121,17 @@ int len;
int get_dl_handler(worker_st *ws, unsigned http_ver)
{
int ret;
const char *data;
int len;
oclog(ws, LOG_HTTP_DEBUG, "requested downloader: %s", ws->req.url);
data = SH_SCRIPT;
len = sizeof(SH_SCRIPT)-1;
cstp_cork(ws);
ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Content-Type: application/x-shellscript\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
if (ret < 0)
return -1;
ret = cstp_printf(ws, "Content-Length: %d\r\n\r\n", len);
if (ret < 0)
return -1;
ret = cstp_send(ws, data, len);
if (ret < 0)
return -1;
ret = cstp_uncork(ws);
if (ret < 0)
return -1;
return 0;
return send_string(ws, http_ver, "application/x-shellscript", SH_SCRIPT,
sizeof(SH_SCRIPT) - 1);
}
#define EMPTY_MSG "<html></html>\n"
int get_empty_handler(worker_st *ws, unsigned http_ver)
{
int ret;
cstp_cork(ws);
ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "Content-Type: text/html\r\n");
if (ret < 0)
return -1;
ret = cstp_printf(ws, "Content-Length: %u\r\n", (unsigned int)sizeof(empty_msg)-1);
if (ret < 0)
return -1;
ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
if (ret < 0)
return -1;
ret = cstp_puts(ws, "\r\n");
if (ret < 0)
return -1;
ret = cstp_send(ws, empty_msg, sizeof(empty_msg)-1);
if (ret < 0)
return -1;
ret = cstp_uncork(ws);
if (ret < 0)
return -1;
return 0;
return send_string(ws, http_ver, "text/html", EMPTY_MSG,
sizeof(EMPTY_MSG) - 1);
}
#endif