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|
/**
* @file
* @author 2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#include "URL.h"
#include "uscxml/messages/Event.h"
#include <string>
#include <cassert>
#include "uscxml/interpreter/Logging.h"
#include "uscxml/config.h"
#include <curl/curl.h>
#include <uriparser/Uri.h>
#ifdef _WIN32
#include <direct.h>
#define getcwd _getcwd
#else
#include <unistd.h> // getcwd
//#include <pwd.h>
#endif
#define DOWNLOAD_IF_NECESSARY if (!_isDownloaded) { download(true); }
#define USCXML_URI_STRING(obj, field) std::string(obj.field.first, (obj.field.afterLast - obj.field.first))
namespace uscxml {
void URLImpl::prepareException(ErrorEvent& exception, int errorCode, const std::string& origUri, void* parser) {
exception.data.compound["uri"].atom = origUri;
if (parser != NULL && ((UriParserStateA*)parser)->errorPos != NULL) {
const char* startPtr = origUri.c_str();
while(startPtr != ((UriParserStateA*)parser)->errorPos && *startPtr != '\0') {
exception.data.compound["urk"].atom += " ";
startPtr++;
}
exception.data.compound["urk"].atom += "^";
}
switch (errorCode) {
case URI_ERROR_SYNTAX:
exception.data.compound["cause"].atom = "Parsed text violates expected format";
break;
case URI_ERROR_NULL:
exception.data.compound["cause"].atom = "One of the params passed was NULL although it mustn't be";
break;
case URI_ERROR_MALLOC:
exception.data.compound["cause"].atom = "Requested memory could not be allocated";
break;
case URI_ERROR_OUTPUT_TOO_LARGE:
exception.data.compound["cause"].atom = "Some output is to large for the receiving buffer";
break;
case URI_ERROR_NOT_IMPLEMENTED:
exception.data.compound["cause"].atom = "The called function is not implemented yet";
break;
case URI_ERROR_RANGE_INVALID:
exception.data.compound["cause"].atom = "The parameters passed contained invalid ranges";
break;
case URI_ERROR_ADDBASE_REL_BASE:
exception.data.compound["cause"].atom = "Given base is not absolute";
break;
case URI_ERROR_REMOVEBASE_REL_SOURCE:
exception.data.compound["cause"].atom = "Given base is not absolute";
break;
default:
break;
}
}
URLImpl::URLImpl() : _handle(NULL), _requestType(GET), _isDownloaded(false), _hasFailed(false) {
_uri = malloc(sizeof(UriUriA));
}
URLImpl::URLImpl(const std::string& url) : _orig(url), _handle(NULL), _requestType(GET), _isDownloaded(false), _hasFailed(false) {
UriParserStateA state;
_uri = malloc(sizeof(UriUriA));
state.uri = (UriUriA*)_uri;
int err = uriParseUriA(&state, _orig.c_str());
if (err != URI_SUCCESS) {
UriParserStateA state2;
state2.uri = (UriUriA*)_uri;
char* tmp = (char*)malloc(8 + 3 * _orig.size() + 1);
uriWindowsFilenameToUriStringA(_orig.c_str(), tmp);
_orig = std::string(tmp);
err = uriParseUriA(&state2, _orig.c_str());
free(tmp);
}
if (err != URI_SUCCESS) {
UriParserStateA state2;
state2.uri = (UriUriA*)_uri;
char* tmp = (char*)malloc(7 + 3 * _orig.size() + 1 );
uriUnixFilenameToUriStringA(_orig.c_str(), tmp);
_orig = std::string(tmp);
err = uriParseUriA(&state2, _orig.c_str());
free(tmp);
}
if (err != URI_SUCCESS) {
ErrorEvent exc;
prepareException(exc, err, _orig, &state);
throw exc;
}
}
URLImpl::~URLImpl() {
uriFreeUriMembersA((UriUriA*)_uri);
if (_handle != NULL)
curl_easy_cleanup(_handle);
free(_uri);
}
URL URLImpl::resolve(URLImpl* relative, URLImpl* absolute) {
std::shared_ptr<URLImpl> dest(new URLImpl());
int err = uriAddBaseUriExA(((UriUriA*)dest->_uri),
((UriUriA*)relative->_uri),
((UriUriA*)absolute->_uri), URI_RESOLVE_IDENTICAL_SCHEME_COMPAT);
if (err != URI_SUCCESS) {
ErrorEvent exc("Cannot resolve " + (std::string)(*relative) + " with " + (std::string)(*absolute));
prepareException(exc, err, "", NULL);
throw exc;
}
// serialize as string and reparse to mantain string in _orig
return URL((std::string)(*dest.get()));
}
URL URLImpl::resolveWithCWD(URLImpl* relative) {
char currPath[FILENAME_MAX];
if (!getcwd(currPath, sizeof(currPath))) {
ERROR_PLATFORM_THROW("Cannot get current working directory");
}
currPath[sizeof(currPath) - 1] = '\0'; /* not really required? */
// without the trailing slash, last component is assumed a file
#if WIN32
std::shared_ptr<URLImpl> cwdURL(new URLImpl(std::string(currPath)));
#else
std::shared_ptr<URLImpl> cwdURL(new URLImpl(std::string("file://") + currPath + PATH_SEPERATOR));
#endif
return resolve(relative, cwdURL.get());
}
URL URLImpl::refer(URLImpl* absoluteSource, URLImpl* absoluteBase) {
std::shared_ptr<URLImpl> dest(new URLImpl());
int err = uriRemoveBaseUriA(((UriUriA*)dest->_uri),
((UriUriA*)absoluteSource->_uri),
((UriUriA*)absoluteBase->_uri), URI_FALSE);
if (err != URI_SUCCESS) {
ErrorEvent exc("Cannot make a relative reference for " + (std::string)(*absoluteSource) + " with " + (std::string)(*absoluteBase));
prepareException(exc, err, "", NULL);
throw exc;
}
// serialize as string and reparse to mantain string in _orig
return URL((std::string)(*dest.get()));
}
void URLImpl::normalize() {
int err = uriNormalizeSyntaxA((UriUriA*)_uri);
if (err != URI_SUCCESS) {
ErrorEvent exc("Cannot normalize URL " + (std::string)*this);
prepareException(exc, err, _orig, NULL);
throw exc;
}
}
bool URLImpl::isAbsolute() const {
// see https://sourceforge.net/p/uriparser/bugs/3/
return ((UriUriA*)_uri)->absolutePath || ((((UriUriA*)_uri)->hostText.first != nullptr) && (((UriUriA*)_uri)->pathHead != nullptr));
}
std::string URLImpl::scheme() const {
return USCXML_URI_STRING((*(UriUriA*)_uri), scheme);
}
std::string URLImpl::userInfo() const {
return USCXML_URI_STRING((*(UriUriA*)_uri), userInfo);
}
std::string URLImpl::host() const {
return USCXML_URI_STRING((*(UriUriA*)_uri), hostText);
}
std::string URLImpl::port() const {
return USCXML_URI_STRING((*(UriUriA*)_uri), portText);
}
std::string URLImpl::fragment() const {
return USCXML_URI_STRING((*(UriUriA*)_uri), fragment);
}
std::string URLImpl::path() const {
UriPathSegmentA* firstSeg = ((UriUriA*)_uri)->pathHead;
UriPathSegmentA* lastSeg = firstSeg;
while(lastSeg->next) {
lastSeg = lastSeg->next;
}
std::string path;
// what a mess!
if (((UriUriA*)_uri)->absolutePath ||
(((UriUriA*)_uri)->pathHead != NULL &&
(((UriUriA*)_uri)->hostText.first != NULL ||
((UriUriA*)_uri)->hostData.ip4 != NULL ||
((UriUriA*)_uri)->hostData.ip6 != NULL ||
((UriUriA*)_uri)->hostData.ipFuture.first != NULL))) {
path += "/";
}
path += std::string(firstSeg->text.first, lastSeg->text.afterLast - firstSeg->text.first);
return path;
}
std::list<std::string> URLImpl::pathComponents() const {
std::list<std::string> pathList;
UriPathSegmentA* currSeg = ((UriUriA*)_uri)->pathHead;
while(currSeg != NULL) {
pathList.push_back(USCXML_URI_STRING((*currSeg), text));
currSeg = currSeg->next;
}
return pathList;
}
std::map<std::string, std::string> URLImpl::query() const {
UriQueryListA * queryList;
UriQueryListA * currList;
std::map<std::string, std::string> queryMap;
int itemCount;
int err = uriDissectQueryMallocA(&queryList, &itemCount, (*(UriUriA*)_uri).query.first, (*(UriUriA*)_uri).query.afterLast);
if (err != URI_SUCCESS) {
ErrorEvent exc("Cannot get query from URL " + (std::string)*this);
prepareException(exc, err, _orig, NULL);
throw exc;
}
currList = queryList;
while(currList != NULL) {
queryMap[currList->key] = currList->value != NULL ? currList->value : "";
currList = currList->next;
}
uriFreeQueryListA(queryList);
return queryMap;
}
CURL* URLImpl::getCurlHandle() {
if (_handle == NULL) {
_handle = curl_easy_init();
if (_handle == NULL)
LOG(USCXML_ERROR) << "curl_easy_init returned NULL, this is bad!";
}
return _handle;
}
size_t URLImpl::writeHandler(void *ptr, size_t size, size_t nmemb, void *userdata) {
URLImpl* url = (URLImpl*)userdata;
url->_rawInContent.write((char*)ptr, size * nmemb);
std::set<URLMonitor*>::iterator monIter = url->_monitors.begin();
while(monIter != url->_monitors.end()) {
(*monIter)->contentChunkReceived(URL(url->shared_from_this()), std::string((char*)ptr, size * nmemb));
monIter++;
}
return size * nmemb;
}
size_t URLImpl::headerHandler(void *ptr, size_t size, size_t nmemb, void *userdata) {
URLImpl* url = (URLImpl*)userdata;
url->_rawInHeader.write((char*)ptr, size * nmemb);
std::set<URLMonitor*>::iterator monIter = url->_monitors.begin();
while(monIter != url->_monitors.end()) {
(*monIter)->headerChunkReceived(URL(url->shared_from_this()), std::string((char*)ptr, size * nmemb));
monIter++;
}
return size * nmemb;
}
void URLImpl::downloadStarted() {
// LOG(USCXML_INFO) << "Starting download of " << asString() << std::endl;
_rawInContent.str("");
_rawInContent.clear();
_rawInHeader.str("");
_rawInHeader.clear();
_statusMsg = "";
_statusCode = "";
std::set<URLMonitor*>::iterator monIter = _monitors.begin();
while(monIter != _monitors.end()) {
(*monIter)->downloadStarted(URL(shared_from_this()));
monIter++;
}
}
void URLImpl::downloadCompleted() {
std::lock_guard<std::recursive_mutex> lock(_mutex);
if (iequals(scheme(), "http")) {
// process header fields
std::string line;
while (std::getline(_rawInHeader, line)) {
size_t colon = line.find_first_of(":");
size_t newline = line.find_first_of("\r\n");
if (newline == std::string::npos)
newline = line.size();
if (colon == std::string::npos) {
_statusMsg = line.substr(0, newline);
if (_statusMsg.length() >= 11)
_statusCode = _statusMsg.substr(9, 3);
} else {
std::string key = line.substr(0, colon);
size_t firstChar = line.find_first_not_of(": ", colon, 2);
if (firstChar == std::string::npos) {
// nothing but spaces?
_inHeaders[line.substr(0, newline)] = "";
} else {
std::string value = line.substr(firstChar, newline - firstChar);
_inHeaders[key] = value;
}
}
}
}
_hasFailed = false;
_isDownloaded = true;
_condVar.notify_all();
std::set<URLMonitor*>::iterator monIter = _monitors.begin();
while(monIter != _monitors.end()) {
(*monIter)->downloadCompleted(URL(shared_from_this()));
monIter++;
}
}
void URLImpl::downloadFailed(int errorCode) {
std::lock_guard<std::recursive_mutex> lock(_mutex);
_error = curl_easy_strerror((CURLcode)errorCode);
_hasFailed = true;
_isDownloaded = false;
_condVar.notify_all();
std::set<URLMonitor*>::iterator monIter = _monitors.begin();
while(monIter != _monitors.end()) {
(*monIter)->downloadFailed(URL(shared_from_this()), errorCode);
monIter++;
}
}
void URLImpl::addOutHeader(const std::string& key, const std::string& value) {
_outHeader[key] = value;
}
void URLImpl::setOutContent(const std::string& content) {
_outContent = content;
_requestType = URLRequestType::POST;
}
void URLImpl::setRequestType(URLRequestType requestType) {
_requestType = requestType;
}
const std::map<std::string, std::string> URLImpl::getInHeaderFields() {
DOWNLOAD_IF_NECESSARY
return _inHeaders;
}
const std::string URLImpl::getInHeaderField(const std::string& key) {
DOWNLOAD_IF_NECESSARY
if (_inHeaders.find(key) != _inHeaders.end()) {
return _inHeaders[key];
}
return "";
}
const std::string URLImpl::getStatusCode() const {
// DOWNLOAD_IF_NECESSARY
return _statusCode;
}
const std::string URLImpl::getStatusMessage() const {
// DOWNLOAD_IF_NECESSARY
return _statusMsg;
}
const std::string URLImpl::getInContent(bool forceReload) {
if (forceReload)
_isDownloaded = false;
DOWNLOAD_IF_NECESSARY
return _rawInContent.str();
}
const void URLImpl::download(bool blocking) {
std::lock_guard<std::recursive_mutex> lock(_mutex);
if (_isDownloaded)
return;
URL url(shared_from_this());
URLFetcher::fetchURL(url);
if (blocking) {
while(!_isDownloaded && !_hasFailed) {
_condVar.wait(_mutex); // wait for notification
}
if (_hasFailed) {
ERROR_COMMUNICATION(exc, _error);
// exc.data = URL(shared_from_this());
throw exc;
}
if (iequals(scheme(), "http")) {
if (_statusCode.size() > 0 && strTo<int>(_statusCode) > 400) {
ERROR_COMMUNICATION(exc, _error);
// exc.data = URL(shared_from_this());
if (_error.length() > 0)
exc.data.compound["cause"] = Data(_error, Data::VERBATIM);
throw exc;
}
}
}
}
URLImpl::operator Data() const {
Data data;
data.compound["url"] = Data(std::string(*this), Data::VERBATIM);
data.compound["host"] = Data(host(), Data::VERBATIM);
data.compound["scheme"] = Data(scheme(), Data::VERBATIM);
data.compound["path"] = Data(path(), Data::VERBATIM);
data.compound["port"] = Data(port(), Data::INTERPRETED);
data.compound["isAbsolute"] = Data(isAbsolute());
if (_statusCode.length() > 0)
data.compound["statusCode"] = Data(_statusCode, Data::VERBATIM);
if (_statusMsg.length() > 0)
data.compound["statusMsg"] = Data(_statusMsg, Data::VERBATIM);
std::list<std::string> pathComps = pathComponents();
std::list<std::string>::const_iterator pathIter = pathComps.begin();
while(pathIter != pathComps.end()) {
data.compound["pathComponent"].array.push_back(Data(*pathIter, Data::VERBATIM));
pathIter++;
}
return data;
}
URLImpl::operator std::string() const {
int charsRequired = 0;
if (uriToStringCharsRequiredA((UriUriA*)_uri, &charsRequired) != URI_SUCCESS) {
throw ErrorEvent("Cannot recompose URL");
}
charsRequired++;
char * uriString;
uriString = (char*)malloc(charsRequired * sizeof(char));
if (uriString == NULL) {
throw ErrorEvent("Malloc failed");
}
if (uriToStringA(uriString, (UriUriA*)_uri, charsRequired, NULL) != URI_SUCCESS) {
free(uriString);
throw ErrorEvent("Cannot recompose URL");
}
std::string recomposed(uriString);
free(uriString);
return recomposed;
}
URLFetcher::URLFetcher() {
_isStarted = false;
_envProxy = NULL;
_multiHandle = curl_multi_init();
// read proxy information from environment
// CURLOPT_PROXY;
// CURLOPT_PROXY_TRANSFER_MODE;
// CURLOPT_PROXYAUTH;
// CURLOPT_PROXYHEADER;
// CURLOPT_PROXYPASSWORD;
// CURLOPT_PROXYPORT;
// CURLOPT_PROXYTYPE;
// CURLOPT_PROXYUSERNAME;
// CURLOPT_PROXYUSERPWD;
/*
see http://curl.haxx.se/libcurl/c/CURLOPT_PROXY.html
e.g. 'socks5://bob:marley@localhost:12345'
*/
_envProxy = getenv("USCXML_PROXY");
#if 0
bool unsupported = false;
CURLcode curlError;
// exposed just in case
char* envProxyTransferMode = getenv("USCXML_PROXY_TRANSFER_MODE");
char* envProxyAuth = getenv("USCXML_PROXYAUTH");
// char* envProxyHeader = getenv("USCXML_PROXYHEADER"); // not available in older curl
char* envProxyPassword = getenv("USCXML_PROXYPASSWORD");
char* envProxyPort = getenv("USCXML_PROXYPORT");
// char* envProxyType = getenv("USCXML_PROXYTYPE"); // takes an int, have another look if needed
char* envProxyUsername = getenv("USCXML_PROXYUSERNAME");
char* envProxyUserPwd = getenv("USCXML_PROXYUSERPWD");
/* Name of proxy to use. */
if (envProxy)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXY, envProxy)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy: " << curl_easy_strerror(curlError);
/* set transfer mode (;type=<a|i>) when doing FTP via an HTTP proxy */
if (envProxyTransferMode)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXY_TRANSFER_MODE, envProxyTransferMode)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy transfer mode: " << curl_easy_strerror(curlError);
/* Set this to a bitmask value to enable the particular authentications
methods you like. Use this in combination with CURLOPT_PROXYUSERPWD.
Note that setting multiple bits may cause extra network round-trips. */
if (envProxyAuth)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYAUTH, envProxyAuth)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy authentication: " << curl_easy_strerror(curlError);
#if 0
/* This points to a linked list of headers used for proxy requests only,
struct curl_slist kind */
if (envProxyHeader && unsupported)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYHEADER, envProxyHeader)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy header: " << curl_easy_strerror(curlError);
#endif
/* "name" and "pwd" to use with Proxy when fetching. */
if (envProxyUsername)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYUSERNAME, envProxyUsername)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy username: " << curl_easy_strerror(curlError);
if (envProxyPassword)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYPASSWORD, envProxyPassword)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy password: " << curl_easy_strerror(curlError);
/* Port of the proxy, can be set in the proxy string as well with:
"[host]:[port]" */
if (envProxyPort)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYPORT, envProxyPort)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy port: " << curl_easy_strerror(curlError);
#if 0
/* indicates type of proxy. accepted values are CURLPROXY_HTTP (default),
CURLPROXY_SOCKS4, CURLPROXY_SOCKS4A and CURLPROXY_SOCKS5. */
if (envProxyType && unsupported)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYTYPE, envProxyType)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy type: " << curl_easy_strerror(curlError);
#endif
/* "user:password" to use with proxy. */
if (envProxyUserPwd)
(curlError = curl_easy_setopt(_multiHandle, CURLOPT_PROXYUSERPWD, envProxyUserPwd)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy user password: " << curl_easy_strerror(curlError);
#endif
start();
}
URLFetcher::~URLFetcher() {
stop();
curl_multi_cleanup(_multiHandle);
}
void URLFetcher::fetchURL(URL& url) {
URLFetcher* instance = getInstance();
std::lock_guard<std::recursive_mutex> lock(instance->_mutex);
CURL* handle = url._impl->getCurlHandle();
assert(handle != NULL);
if (handle == NULL)
return;
if (instance->_handlesToURLs.find(handle) == instance->_handlesToURLs.end()) {
CURLcode curlError;
std::string fromURL(url);
(curlError = curl_easy_setopt(handle, CURLOPT_URL, fromURL.c_str())) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set url to " << std::string(url) << ": " << curl_easy_strerror(curlError);
// (curlError = curl_easy_setopt(handle, CURLOPT_NOSIGNAL, 1)) == CURLE_OK ||
// LOG(USCXML_ERROR) << "Cannot set curl to ignore signals: " << curl_easy_strerror(curlError);
// (curlError = curl_easy_setopt(handle, CURLOPT_FORBID_REUSE, 1)) == CURLE_OK ||
// LOG(USCXML_ERROR) << "Cannot force noreuse: " << curl_easy_strerror(curlError);
// (curlError = curl_easy_setopt(handle, CURLOPT_VERBOSE, 1)) == CURLE_OK ||
// LOG(USCXML_ERROR) << "Cannot set verbose: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_WRITEDATA, url._impl.get())) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot register this as write userdata: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, URLImpl::writeHandler)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set write callback: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_HEADERFUNCTION, URLImpl::headerHandler)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot request header from curl: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_HEADERDATA, url._impl.get())) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot register this as header userdata: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_SSL_VERIFYPEER, false)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot forfeit peer verification: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_USERAGENT, "uscxml/" USCXML_VERSION)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set our user agent string: " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_FOLLOWLOCATION, true)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot enable follow redirects: " << curl_easy_strerror(curlError);
if (instance->_envProxy)
(curlError = curl_easy_setopt(handle, CURLOPT_PROXY, instance->_envProxy)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set curl proxy: " << curl_easy_strerror(curlError);
if (url._impl->_requestType == URLRequestType::POST) {
(curlError = curl_easy_setopt(handle, CURLOPT_POST, 1)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set request type to post for " << std::string(url) << ": " << curl_easy_strerror(curlError);
(curlError = curl_easy_setopt(handle, CURLOPT_COPYPOSTFIELDS, url._impl->_outContent.c_str())) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set post data " << std::string(url) << ": " << curl_easy_strerror(curlError);
// Disable "Expect: 100-continue"
// curl_slist* disallowed_headers = 0;
// disallowed_headers = curl_slist_append(disallowed_headers, "Expect:");
// (curlError = curl_easy_setopt(handle, CURLOPT_HTTPHEADER, disallowed_headers)) == CURLE_OK ||
// LOG(USCXML_ERROR) << "Cannot disable Expect 100 header: " << curl_easy_strerror(curlError);
struct curl_slist* headers = NULL;
std::map<std::string, std::string>::iterator paramIter = url._impl->_outHeader.begin();
while(paramIter != url._impl->_outHeader.end()) {
// char* key = curl_easy_escape(handle, paramIter->first.c_str(), paramIter->first.length());
// char* value = curl_easy_escape(handle, paramIter->second.c_str(), paramIter->second.length());
const char* value = paramIter->second.c_str();
char* header = (char*)malloc(paramIter->first.size() + strlen(value) + 3);
sprintf(header,"%s: %s", paramIter->first.c_str(), value);
headers = curl_slist_append(headers, header);
free(header);
// curl_free(key);
// curl_free(value);
paramIter++;
}
// Disable "Expect: 100-continue"
headers = curl_slist_append(headers, "Expect:");
instance->_handlesToHeaders[handle] = headers;
(curlError = curl_easy_setopt(handle, CURLOPT_HTTPHEADER, headers)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot headers for " << std::string(url) << ": " << curl_easy_strerror(curlError);
// curl_slist_free_all(headers);
} else if (url._impl->_requestType == URLRequestType::GET) {
(curlError = curl_easy_setopt(handle, CURLOPT_HTTPGET, 1)) == CURLE_OK ||
LOG(USCXML_ERROR) << "Cannot set request type to get for " << std::string(url) << ": " << curl_easy_strerror(curlError);
}
url._impl->downloadStarted();
instance->_handlesToURLs[handle] = url;
assert(instance->_handlesToURLs.size() > 0);
curl_multi_add_handle(instance->_multiHandle, handle);
instance->_condVar.notify_all();
}
}
void URLFetcher::breakURL(URL& url) {
URLFetcher* instance = getInstance();
CURL* handle = url._impl->getCurlHandle();
std::lock_guard<std::recursive_mutex> lock(instance->_mutex);
if (instance->_handlesToURLs.find(handle) != instance->_handlesToURLs.end()) {
url._impl->downloadFailed(CURLE_OK);
curl_multi_remove_handle(instance->_multiHandle, handle);
instance->_handlesToURLs.erase(handle);
}
if (instance->_handlesToHeaders.find(handle) != instance->_handlesToHeaders.end()) {
curl_slist_free_all((struct curl_slist *)instance->_handlesToHeaders[handle]);
instance->_handlesToHeaders.erase(handle);
}
}
void URLFetcher::start() {
std::lock_guard<std::recursive_mutex> lock(_mutex);
if (!_isStarted) {
_isStarted = true;
_thread = new std::thread(URLFetcher::run, this);
}
}
void URLFetcher::stop() {
std::lock_guard<std::recursive_mutex> lock(_mutex);
if (_isStarted) {
_isStarted = false;
_thread->join();
delete _thread;
}
}
void URLFetcher::run(void* instance) {
URLFetcher* fetcher = (URLFetcher*)instance;
while(fetcher->_isStarted) {
fetcher->perform();
}
LOG(USCXML_ERROR) << "URLFetcher thread stopped!";
}
void URLFetcher::perform() {
CURLMsg *msg; /* for picking up messages with the transfer status */
int msgsLeft; /* how many messages are left */
int stillRunning;
CURLMcode err;
{
std::lock_guard<std::recursive_mutex> lock(_mutex);
if (_handlesToURLs.empty()) {
_condVar.wait(_mutex);
}
err = curl_multi_perform(_multiHandle, &stillRunning);
if (err != CURLM_OK) {
LOG(USCXML_WARN) << "curl_multi_perform: " << curl_multi_strerror(err);
}
}
do {
struct timeval timeout;
int rc; /* select() return code */
fd_set fdread, fdwrite, fdexcep;
FD_ZERO(&fdread);
FD_ZERO(&fdwrite);
FD_ZERO(&fdexcep);
int maxfd = -1;
long curlTimeOut = -1;
/* set a suitable timeout to play around with */
timeout.tv_sec = 1;
timeout.tv_usec = 0;
{
std::lock_guard<std::recursive_mutex> lock(_mutex);
err = curl_multi_timeout(_multiHandle, &curlTimeOut);
if (err != CURLM_OK) {
LOG(USCXML_WARN) << "curl_multi_timeout: " << curl_multi_strerror(err);
}
}
if(curlTimeOut >= 0) {
timeout.tv_sec = curlTimeOut / 1000;
if(timeout.tv_sec > 1) {
timeout.tv_sec = 1;
} else {
timeout.tv_usec = (curlTimeOut % 1000) * 1000;
}
}
/* get file descriptors from the transfers */
{
std::lock_guard<std::recursive_mutex> lock(_mutex);
err = curl_multi_fdset(_multiHandle, &fdread, &fdwrite, &fdexcep, &maxfd);
if (err != CURLM_OK) {
LOG(USCXML_WARN) << "curl_multi_fdset: " << curl_multi_strerror(err);
}
}
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
switch(rc) {
case -1:
/* select error */
break;
case 0: /* timeout */
default: { /* action */
std::lock_guard<std::recursive_mutex> lock(_mutex);
err = curl_multi_perform(_multiHandle, &stillRunning);
if (err != CURLM_OK) {
LOG(USCXML_WARN) << "curl_multi_perform: " << curl_multi_strerror(err);
}
break;
}
}
{
std::lock_guard<std::recursive_mutex> lock(_mutex);
while ((msg = curl_multi_info_read(_multiHandle, &msgsLeft))) {
if (msg->msg == CURLMSG_DONE) {
switch (msg->data.result) {
case CURLE_OK:
_handlesToURLs[msg->easy_handle]._impl->downloadCompleted();
err = curl_multi_remove_handle(_multiHandle, msg->easy_handle);
if (err != CURLM_OK) {
LOG(USCXML_WARN) << "curl_multi_remove_handle: " << curl_multi_strerror(err);
}
break;
default:
_handlesToURLs[msg->easy_handle]._impl->downloadFailed(msg->data.result);
err = curl_multi_remove_handle(_multiHandle, msg->easy_handle);
if (err != CURLM_OK) {
LOG(USCXML_WARN) << "curl_multi_remove_handle: " << curl_multi_strerror(err);
}
break;
}
_handlesToURLs.erase(msg->easy_handle);
curl_slist_free_all((struct curl_slist *)_handlesToHeaders[msg->easy_handle]);
_handlesToHeaders.erase(msg->easy_handle);
} else {
LOG(USCXML_ERROR) << "Curl reports info on unfinished download?!";
}
}
}
} while(stillRunning && _isStarted);
}
URLFetcher* URLFetcher::_instance = NULL;
URLFetcher* URLFetcher::getInstance() {
if (_instance == NULL) {
_instance = new URLFetcher();
}
return _instance;
}
}
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