/* ****************************************************************************
*
* httpRequestSend -
*
* RETURN VALUES
* httpRequestSend returns 0 on success and a negative number on failure:
* -1: Invalid port
* -2: Invalid IP
* -3: Invalid verb
* -4: Invalid resource
* -5: No Content-Type BUT content present
* -6: Content-Type present but there is no content
* -7: Total outgoing message size is too big
* -8: Unable to initialize libcurl
* -9: Error making HTTP request
*
* [ error codes -1 to -7 comes from httpRequestSendWithCurl ]
*/
int httpRequestSend
(
const std::string& _ip,
unsigned short port,
const std::string& protocol,
const std::string& verb,
const std::string& tenant,
const std::string& servicePath,
const std::string& xauthToken,
const std::string& resource,
const std::string& orig_content_type,
const std::string& content,
const std::string& fiwareCorrelation,
const std::string& ngisv2AttrFormat,
bool useRush,
bool waitForResponse,
std::string* outP,
const std::string& acceptFormat,
long timeoutInMilliseconds
)
{
struct curl_context cc;
int response;
get_curl_context(_ip, &cc);
if (cc.curl == NULL)
{
release_curl_context(&cc);
LM_E(("Runtime Error (could not init libcurl)"));
lmTransactionEnd();
*outP = "error";
return -8;
}
response = httpRequestSendWithCurl(cc.curl,
_ip,
port,
protocol,
verb,
tenant,
servicePath,
xauthToken,
resource,
orig_content_type,
content,
fiwareCorrelation,
ngisv2AttrFormat,
useRush,
waitForResponse,
outP,
acceptFormat,
timeoutInMilliseconds);
release_curl_context(&cc);
return response;
}
/* ****************************************************************************
*
* httpRequestSend -
*/
std::string httpRequestSend
(
const std::string& _ip,
unsigned short port,
const std::string& protocol,
const std::string& verb,
const std::string& tenant,
const std::string& servicePath,
const std::string& xauthToken,
const std::string& resource,
const std::string& content_type,
const std::string& content,
bool useRush,
bool waitForResponse,
const std::string& acceptFormat,
long timeoutInMilliseconds
)
{
char portAsString[16];
static unsigned long long callNo = 0;
std::string result;
std::string ip = _ip;
struct curl_slist* headers = NULL;
MemoryStruct* httpResponse = NULL;
CURLcode res;
int outgoingMsgSize = 0;
CURL* curl;
struct curl_context cc;
++callNo;
if (timeoutInMilliseconds == -1)
{
timeoutInMilliseconds = defaultTimeout;
}
LM_TRANSACTION_START("to", ip.c_str(), port, resource.c_str());
// Preconditions check
if (port == 0)
{
LM_E(("Runtime Error (port is ZERO)"));
LM_TRANSACTION_END();
return "error";
}
if (ip.empty())
{
LM_E(("Runtime Error (ip is empty)"));
LM_TRANSACTION_END();
return "error";
}
if (verb.empty())
{
LM_E(("Runtime Error (verb is empty)"));
LM_TRANSACTION_END();
return "error";
}
if (resource.empty())
{
LM_E(("Runtime Error (resource is empty)"));
LM_TRANSACTION_END();
return "error";
}
if ((content_type.empty()) && (!content.empty()))
{
LM_E(("Runtime Error (Content-Type is empty but there is actual content)"));
LM_TRANSACTION_END();
return "error";
}
if ((!content_type.empty()) && (content.empty()))
{
LM_E(("Runtime Error (Content-Type non-empty but there is no content)"));
LM_TRANSACTION_END();
return "error";
}
get_curl_context(ip, &cc);
if ((curl = cc.curl) == NULL)
{
LM_E(("Runtime Error (could not init libcurl)"));
LM_TRANSACTION_END();
release_curl_context(&cc);
return "error";
}
// Allocate to hold HTTP response
httpResponse = new MemoryStruct;
httpResponse->memory = (char*) malloc(1); // will grow as needed
httpResponse->size = 0; // no data at this point
//
// Rush
// Every call to httpRequestSend specifies whether RUSH should be used or not.
// But, this depends also on how the broker was started, so here the 'useRush'
// parameter is cancelled in case the broker was started without rush.
//
// If rush is to be used, the IP/port is stored in rushHeaderIP/rushHeaderPort and
// after that, the host and port of rush is set as ip/port for the message, that is
// now sent to rush instead of to its final destination.
// Also, a few HTTP headers for rush must be setup.
//
if ((rushPort == 0) || (rushHost == ""))
useRush = false;
if (useRush)
{
char rushHeaderPortAsString[16];
uint16_t rushHeaderPort = 0;
std::string rushHeaderIP = "";
std::string headerRushHttp = "";
rushHeaderIP = ip;
rushHeaderPort = port;
ip = rushHost;
port = rushPort;
snprintf(rushHeaderPortAsString, sizeof(rushHeaderPortAsString), "%d", rushHeaderPort);
headerRushHttp = "X-relayer-host: " + rushHeaderIP + ":" + rushHeaderPortAsString;
LM_T(LmtHttpHeaders, ("HTTP-HEADERS: '%s'", headerRushHttp.c_str()));
headers = curl_slist_append(headers, headerRushHttp.c_str());
outgoingMsgSize += headerRushHttp.size();
if (protocol == "https:")
{
headerRushHttp = "X-relayer-protocol: https";
LM_T(LmtHttpHeaders, ("HTTP-HEADERS: '%s'", headerRushHttp.c_str()));
headers = curl_slist_append(headers, headerRushHttp.c_str());
outgoingMsgSize += headerRushHttp.size();
}
}
snprintf(portAsString, sizeof(portAsString), "%d", port);
// ----- User Agent
char cvBuf[CURL_VERSION_MAX_LENGTH];
char headerUserAgent[HTTP_HEADER_USER_AGENT_MAX_LENGTH];
snprintf(headerUserAgent, sizeof(headerUserAgent), "User-Agent: orion/%s libcurl/%s", versionGet(), curlVersionGet(cvBuf, sizeof(cvBuf)));
LM_T(LmtHttpHeaders, ("HTTP-HEADERS: '%s'", headerUserAgent));
headers = curl_slist_append(headers, headerUserAgent);
outgoingMsgSize += strlen(headerUserAgent) + 1;
// ----- Host
char headerHost[HTTP_HEADER_HOST_MAX_LENGTH];
snprintf(headerHost, sizeof(headerHost), "Host: %s:%d", ip.c_str(), (int) port);
LM_T(LmtHttpHeaders, ("HTTP-HEADERS: '%s'", headerHost));
headers = curl_slist_append(headers, headerHost);
outgoingMsgSize += strlen(headerHost) + 1;
// ----- Tenant
if (tenant != "")
{
headers = curl_slist_append(headers, ("fiware-service: " + tenant).c_str());
outgoingMsgSize += tenant.size() + 16; // "fiware-service: "
}
// ----- Service-Path
if (servicePath != "")
{
headers = curl_slist_append(headers, ("Fiware-ServicePath: " + servicePath).c_str());
outgoingMsgSize += servicePath.size() + strlen("Fiware-ServicePath: ");
}
// ----- X-Auth-Token
if (xauthToken != "")
{
headers = curl_slist_append(headers, ("X-Auth-Token: " + xauthToken).c_str());
outgoingMsgSize += xauthToken.size() + strlen("X-Auth-Token: ");
}
// ----- Accept
std::string acceptedFormats = "application/xml, application/json";
if (acceptFormat != "")
{
acceptedFormats = acceptFormat;
}
std::string acceptString = "Accept: " + acceptedFormats;
headers = curl_slist_append(headers, acceptString.c_str());
outgoingMsgSize += acceptString.size();
// ----- Expect
headers = curl_slist_append(headers, "Expect: ");
outgoingMsgSize += 8; // from "Expect: "
// ----- Content-length
std::stringstream contentLengthStringStream;
contentLengthStringStream << content.size();
std::string headerContentLength = "Content-length: " + contentLengthStringStream.str();
LM_T(LmtHttpHeaders, ("HTTP-HEADERS: '%s'", headerContentLength.c_str()));
headers = curl_slist_append(headers, headerContentLength.c_str());
outgoingMsgSize += contentLengthStringStream.str().size() + 16; // from "Content-length: "
outgoingMsgSize += content.size();
// ----- Content-type
headers = curl_slist_append(headers, ("Content-type: " + content_type).c_str());
outgoingMsgSize += content_type.size() + 14; // from "Content-type: "
// Check if total outgoing message size is too big
if (outgoingMsgSize > MAX_DYN_MSG_SIZE)
{
LM_E(("Runtime Error (HTTP request to send is too large: %d bytes)", outgoingMsgSize));
// Cleanup curl environment
curl_slist_free_all(headers);
release_curl_context(&cc);
free(httpResponse->memory);
delete httpResponse;
LM_TRANSACTION_END();
return "error";
}
// Contents
const char* payload = content.c_str();
curl_easy_setopt(curl, CURLOPT_POSTFIELDS, (u_int8_t*) payload);
// Set up URL
std::string url;
if (isIPv6(ip))
url = "[" + ip + "]";
else
url = ip;
url = url + ":" + portAsString + (resource.at(0) == '/'? "" : "/") + resource;
// Prepare CURL handle with obtained options
curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, verb.c_str()); // Set HTTP verb
curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L); // Allow redirection (?)
curl_easy_setopt(curl, CURLOPT_HEADER, 1); // Activate include the header in the body output
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers); // Put headers in place
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, &writeMemoryCallback); // Send data here
curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*) httpResponse); // Custom data for response handling
//
// There is a known problem in libcurl (see http://stackoverflow.com/questions/9191668/error-longjmp-causes-uninitialized-stack-frame)
// which is solved using CURLOPT_NOSIGNAL. If we update some day from libcurl 7.19 (the one that comes with CentOS 6.x) to a newer version
// (there are some reports about the bug is no longer in libcurl 7.32), using CURLOPT_NOSIGNAL could be not necessary and this be removed).
// See issue #1016 for more details.
//
curl_easy_setopt(curl, CURLOPT_NOSIGNAL, 1);
//
// Timeout
//
// The parameter timeoutInMilliseconds holds the timeout time in milliseconds.
// If the timeout time requested is 0, then no timeuot is used.
//
if (timeoutInMilliseconds != 0)
{
curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, timeoutInMilliseconds);
}
// Synchronous HTTP request
LM_T(LmtClientOutputPayload, ("Sending message %lu to HTTP server: sending message of %d bytes to HTTP server", callNo, outgoingMsgSize));
res = curl_easy_perform(curl);
if (res != CURLE_OK)
{
//
// NOTE: This log line is used by the functional tests in cases/880_timeout_for_forward_and_notifications/
// So, this line should not be removed/altered, at least not without also modifying the functests.
//
LM_W(("Notification failure for %s:%s (curl_easy_perform failed: %s)", ip.c_str(), portAsString, curl_easy_strerror(res)));
result = "";
}
else
{
// The Response is here
LM_I(("Notification Successfully Sent to %s", url.c_str()));
result.assign(httpResponse->memory, httpResponse->size);
}
// Cleanup curl environment
curl_slist_free_all(headers);
release_curl_context(&cc);
free(httpResponse->memory);
delete httpResponse;
LM_TRANSACTION_END();
return result;
}