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HttpEngine.cpp
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764 lines (682 loc) · 32.5 KB
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/*
* Copyright 2017 Sony Corporation
*/
#include <istream>
#include <ostream>
#include "Poco/Buffer.h"
#include "Poco/Exception.h"
#include "Poco/NumberFormatter.h"
#include "Poco/SharedPtr.h"
#include "Poco/String.h"
#include "Poco/Timespan.h"
#include "Poco/Timestamp.h"
#include "Poco/URI.h"
#include "Poco/Net/Context.h"
#include "Poco/Net/HTTPClientSession.h"
#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/HTTPResponse.h"
#include "Poco/Net/HTTPClientSession.h"
#include "Poco/Net/HTTPSClientSession.h"
#include "Poco/Net/SSLException.h"
#include "easyhttpcpp/common/CacheManager.h"
#include "easyhttpcpp/common/CacheMetadata.h"
#include "easyhttpcpp/common/CoreLogger.h"
#include "easyhttpcpp/common/StringUtil.h"
#include "easyhttpcpp/HttpConstants.h"
#include "easyhttpcpp/HttpException.h"
#include "easyhttpcpp/Request.h"
#include "easyhttpcpp/Response.h"
#include "HttpCacheInternal.h"
#include "HttpCacheMetadata.h"
#include "HttpEngine.h"
#include "HttpUtil.h"
#include "NetworkInterceptorChain.h"
#include "ResponseBodyStreamFromCache.h"
#include "ResponseBodyStreamWithoutCaching.h"
#include "ResponseBodyStreamWithCaching.h"
using easyhttpcpp::common::CacheManager;
using easyhttpcpp::common::CacheMetadata;
using easyhttpcpp::common::StringUtil;
namespace easyhttpcpp {
#define DEFAULT_CONTENT_TYPE HttpConstants::HeaderValues::ApplicationOctetStream // RFC2616 7.2.1
static const std::string Tag = "HttpEngine";
static const bool EnableRedirect = true;
static const bool EnableSchemeChangedRedirect = false;
static const size_t TempResponseBufferBytes = 1024;
HttpEngine::HttpEngine(EasyHttpContext::Ptr pContext, Request::Ptr pRequest, Response::Ptr pPriorResponse) :
m_pContext(pContext), m_pUserRequest(pRequest), m_pPriorResponse(pPriorResponse), m_cancelled(false),
m_connectionRetried(false)
{
}
HttpEngine::~HttpEngine()
{
if (m_pConnectionInternal) {
m_pConnectionInternal->setConnectionStatusListener(NULL);
m_pConnectionInternal = NULL;
}
}
Response::Ptr HttpEngine::execute()
{
Response::Ptr pUserResponse;
Request::Ptr pNetworkRequest;
// find cache candidate and check to be able to use cache.
checkCacheBeforeSendRequest(pUserResponse, pNetworkRequest);
if (pUserResponse) {
EASYHTTPCPP_LOG_D(Tag, "execute: do not access network because use cache.");
return pUserResponse;
}
// execute sendRequest and receiveResponse
Response::Ptr pNetworkResponse;
EasyHttpContext::InterceptorList& networkInterceptors = m_pContext->getNetworkInterceptors();
EasyHttpContext::InterceptorList::iterator it = networkInterceptors.begin();
EasyHttpContext::InterceptorList::const_iterator itEnd = networkInterceptors.end();
if (it == itEnd) {
pNetworkResponse = sendRequestAndReceiveResponseWithRetryByConnection(pNetworkRequest);
} else {
NetworkInterceptorChain::Ptr chain(new NetworkInterceptorChain(*this, pNetworkRequest, it, itEnd));
pNetworkResponse = (*it)->intercept(*chain);
}
// if not exist cache, create user response from network response.
if (!m_pContext->getCache()) {
EASYHTTPCPP_LOG_D(Tag, "return from network response.(no http cache)");
return createUserResponseFromNetworkResponse(pNetworkResponse);
}
// determine cache response can be used.
if (m_pCacheResponse) {
if (HttpCacheStrategy::isValidCacheResponse(m_pCacheResponse, pNetworkResponse)) {
EASYHTTPCPP_LOG_D(Tag, "execute: return from cache.(Not Modified or cache is fresh than network response.)");
// create user response from cache response.
pUserResponse = createUserResponseFromCacheResponse(m_pCacheResponse, pNetworkResponse);
return pUserResponse;
}
}
// check cache condition
if (HttpCacheStrategy::isCacheable(pNetworkResponse)) {
// create user response from network response with caching.
EASYHTTPCPP_LOG_D(Tag, "execute: return from cache response.");
return createUserResponseWithCaching(pNetworkResponse);
} else {
if (HttpCacheStrategy::isInvalidCacheMethod(pNetworkResponse)) {
// remove from cache (POST etc. method)
EASYHTTPCPP_LOG_D(Tag, "execute: remove cache");
removeFromCache(pNetworkResponse);
}
// create user response from network response without caching.
EASYHTTPCPP_LOG_D(Tag, "execute: return from network response.(not cacheable)");
return createUserResponseFromNetworkResponse(pNetworkResponse);
}
}
Response::Ptr HttpEngine::stripBody(Response::Ptr pResponse)
{
if (!pResponse) {
return NULL;
}
ResponseBody::Ptr pBody = pResponse->getBody();
if (!pBody) {
return pResponse;
}
Response::Builder builder(pResponse);
return builder.setBody(NULL).build();
}
Request::Ptr HttpEngine::makeRetryRequest(Response::Ptr pResponse)
{
// check Location
if (!pResponse->hasHeader(HttpConstants::HeaderNames::Location)) {
EASYHTTPCPP_LOG_D(Tag, "isRetryContition: No Location header.");
return NULL;
}
std::string redirectUrl = pResponse->getHeaderValue(HttpConstants::HeaderNames::Location, "");
if (redirectUrl.empty()) {
EASYHTTPCPP_LOG_D(Tag, "isRetryContition: Location value is empty.");
return NULL;
}
std::string resolvedUrl;
try {
Poco::URI::decode(redirectUrl, resolvedUrl);
} catch (const Poco::Exception&) {
EASYHTTPCPP_LOG_D(Tag, "isRetryContition: redirect url can not decode [%s]", redirectUrl.c_str());
return NULL;
}
if (resolvedUrl.empty()) {
EASYHTTPCPP_LOG_D(Tag, "isRetryContition: resolved url is empty. redirectUrl=[%s]", redirectUrl.c_str());
return NULL;
}
// check scheme
Request::Ptr pRequest = pResponse->getRequest();
Poco::URI beforeUri(pRequest->getUrl());
Poco::URI resolvedUri(resolvedUrl);
if (beforeUri.getScheme() != resolvedUri.getScheme() && !EnableSchemeChangedRedirect) {
EASYHTTPCPP_LOG_D(Tag, "isRetryContition: redirect scheme is changed. (not allowed to change scheme)");
return NULL;
}
// remove Authorization TODO: confirm RFC
Headers::Ptr pRequestHeaders = pRequest->getHeaders();
Headers::Ptr pRetryHeaders = new Headers();
for (Headers::HeaderMap::ConstIterator it = pRequestHeaders->begin(); it != pRequestHeaders->end(); it++) {
if (Poco::icompare(it->first, HttpConstants::HeaderNames::Authorization) == 0) {
if (beforeUri.getScheme() != resolvedUri.getScheme()) {
EASYHTTPCPP_LOG_D(Tag, "makeRetryRequest: remove Authorization Header because change scheme.[%s] -> [%s]",
beforeUri.getScheme().c_str(), resolvedUri.getScheme().c_str());
continue;
}
if (beforeUri.getHost() != resolvedUri.getHost()) {
EASYHTTPCPP_LOG_D(Tag, "makeRetryRequest: remove Authorization Header because change host.[%s] -> [%s]",
beforeUri.getHost().c_str(), resolvedUri.getHost().c_str());
continue;
}
if (beforeUri.getPort() != resolvedUri.getPort()) {
EASYHTTPCPP_LOG_D(Tag, "makeRetryRequest: remove Authorization Header because change port.[%u] -> [%u]",
beforeUri.getPort(), resolvedUri.getPort());
continue;
}
}
pRetryHeaders->add(it->first, it->second);
}
Request::Builder retryRequestBuilder(pRequest);
return retryRequestBuilder.setUrl(resolvedUrl).setHeaders(pRetryHeaders).build();
}
void HttpEngine::checkCacheBeforeSendRequest(Response::Ptr& pUserResponse, Request::Ptr& pNetworkRequest)
{
pUserResponse = NULL;
pNetworkRequest = NULL;
HttpCacheInternal* pCacheInternal = static_cast<HttpCacheInternal*> (m_pContext->getCache().get());
if (pCacheInternal == NULL) {
EASYHTTPCPP_LOG_D(Tag, "HttpCache is not used.");
pNetworkRequest = m_pUserRequest;
return;
}
if (!HttpCacheStrategy::isAvailableToCache(m_pUserRequest)) {
EASYHTTPCPP_LOG_D(Tag, "request is not available to cache.");
pNetworkRequest = m_pUserRequest;
return;
}
EASYHTTPCPP_LOG_D(Tag, "request is available to cache.");
HttpCacheStrategy::Ptr pCacheStrategy = pCacheInternal->createCacheStrategy(m_pUserRequest);
pNetworkRequest = pCacheStrategy->getNetworkRequest();
m_pCacheResponse = pCacheStrategy->getCachedResponse();
// when no networkRequest and no cacheResponse, return 504.
if (!pNetworkRequest && !m_pCacheResponse) {
EASYHTTPCPP_LOG_D(Tag, "return 504 because network request and cache response not found.");
Poco::Timestamp now;
Response::Builder builder;
pUserResponse = builder.setRequest(m_pUserRequest)
.setPriorResponse(stripBody(m_pPriorResponse))
.setCode(Poco::Net::HTTPResponse::HTTP_GATEWAY_TIMEOUT)
.setMessage(Poco::Net::HTTPResponse::HTTP_REASON_GATEWAY_TIMEOUT)
.setSentRequestSec(now.epochTime()).setReceivedResponseSec(now.epochTime()).build();
return;
}
// use cacheResponse
if (!pNetworkRequest) {
EASYHTTPCPP_LOG_D(Tag, "user response is cache response.");
pUserResponse = createUserResponseFromCacheResponse(m_pCacheResponse, NULL);
}
}
Response::Ptr HttpEngine::sendRequestAndReceiveResponseWithRetryByConnection(Request::Ptr pNetworkRequest)
{
bool forceToCreateConnection = false;
for (;;) {
bool connectionReused = false;
try {
return sendRequestAndReceiveResponse(pNetworkRequest, forceToCreateConnection, connectionReused);
} catch (const HttpExecutionException& e) {
{
// do not call ConnectionInternal::setConnectionStatusListener with m_connectionMutex locked.
ConnectionInternal::Ptr pConnectionInternal;
{
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
pConnectionInternal = m_pConnectionInternal;
m_pConnectionInternal = NULL;
}
if (!pConnectionInternal) {
EASYHTTPCPP_LOG_D(Tag, "sendRequestAndReceiveResponseWithRetryByConnection: no connection. [%s]",
e.getMessage().c_str());
throw;
}
m_pConnectionPoolInternal->removeConnection(pConnectionInternal);
if (m_cancelled) {
EASYHTTPCPP_LOG_D(Tag, "sendRequestAndReceiveResponseWithRetryByConnection: cancelled. [%s]",
e.getMessage().c_str());
throw;
}
// retry when reusing Connection.
if (!connectionReused) {
EASYHTTPCPP_LOG_D(Tag,
"sendRequestAndReceiveResponseWithRetryByConnection: new connection do not retry. [%s]",
e.getMessage().c_str());
throw;
} else {
RequestBody::Ptr pRequestBody = pNetworkRequest->getBody();
if (pRequestBody && !pRequestBody->reset()) {
EASYHTTPCPP_LOG_D(Tag,
"sendRequestAndReceiveResponseWithRetryByConnection: can not reset request body. [%s]",
e.getMessage().c_str());
throw HttpConnectionRetryException(
"Request body does not support retry. please rebuild request body.", e);
}
pConnectionInternal->setConnectionStatusListener(NULL);
forceToCreateConnection = true;
m_connectionRetried = true;
EASYHTTPCPP_LOG_D(Tag,
"sendRequestAndReceiveResponseWithRetryByConnection: retry connection. [%s]",
e.getMessage().c_str());
}
}
} catch (const HttpException& e) {
EASYHTTPCPP_LOG_D(Tag, "sendRequestAndReceiveResponseWithRetryByConnection: other HttpException. [%s]",
e.getMessage().c_str());
// do not call ConnectionInternal::setConnectionStatusListener with m_connectionMutex locked.
ConnectionInternal::Ptr pConnectionInternal;
{
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
pConnectionInternal = m_pConnectionInternal;
m_pConnectionInternal = NULL;
}
if (pConnectionInternal) {
m_pConnectionPoolInternal->removeConnection(pConnectionInternal);
}
throw;
}
}
}
Response::Ptr HttpEngine::sendRequestAndReceiveResponse(Request::Ptr pNetworkRequest, bool forceToCreateConnection,
bool& connectionReused)
{
connectionReused = false;
{
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
if (m_cancelled) {
EASYHTTPCPP_LOG_D(Tag, "sendRequestAndReceiveResponse: request is cancelled before create Connection.");
throw HttpExecutionException("Http request is cancelled.");
}
}
ConnectionPool::Ptr pConnectionPool = m_pContext->getConnectionPool();
// if ConnectionPool is not specified, create temporary ConnectionPool.
if (!pConnectionPool) {
pConnectionPool = ConnectionPool::createConnectionPool();
}
m_pConnectionPoolInternal = pConnectionPool.unsafeCast<ConnectionPoolInternal>();
Poco::URI uri;
try {
uri = pNetworkRequest->getUrl();
} catch (const Poco::Exception& e) {
EASYHTTPCPP_LOG_D(Tag, "sendRequestAndReceiveResponse: url is not valid. [%s] Poco::Exception=[%s]",
pNetworkRequest->getUrl().c_str(), e.message().c_str());
throw HttpExecutionException(StringUtil::format(
"Url is not valid. [%s] message=[%s]", pNetworkRequest->getUrl().c_str(), e.message().c_str()), e);
}
// get connection.
ConnectionInternal::Ptr pConnectionInternal;
if (forceToCreateConnection) {
pConnectionInternal = m_pConnectionPoolInternal->createConnection(pNetworkRequest, m_pContext);
} else {
pConnectionInternal = m_pConnectionPoolInternal->getConnection(pNetworkRequest, m_pContext, connectionReused);
}
// do not call ConnectionInternal::setConnectionStatusListener with m_connectionMutex locked.
pConnectionInternal->setConnectionStatusListener(this);
{
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
m_pConnectionInternal = pConnectionInternal;
}
// m_pConnection variable does not become invalid during this function.
// m_pConnection variable will become invalid by ResponseBodyStream::close().
// because of this to lock m_connectionMutex does not need.
// if lock m_connectionMutex, can not cancel.
PocoHttpClientSessionPtr pPocoHttpClientSession = pConnectionInternal->getPocoHttpClientSession();
Poco::Timestamp sentRequestTime;
// sendRequest
sendRequest(pPocoHttpClientSession, pNetworkRequest, uri, sentRequestTime);
{
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
// Cancel check after connect.
if (m_cancelled) {
EASYHTTPCPP_LOG_D(Tag, "sendRequestAndReceiveResponse: request is cancelled after connect.");
throw HttpExecutionException("Http request is cancelled.");
}
}
// receiveResponse
return receiveResponse(pPocoHttpClientSession, pNetworkRequest, uri, sentRequestTime);
}
void HttpEngine::sendRequest(PocoHttpClientSessionPtr pPocoHttpClientSession, Request::Ptr pNetworkRequest,
const Poco::URI& uri, Poco::Timestamp& sentRequestTime)
{
// create HTTPRequest and set Content-Length, Content-Type and send request
try {
// create HTTPRequest
Request::HttpMethod method = pNetworkRequest->getMethod();
std::string path(uri.getPathAndQuery());
if (path.empty()) {
path = "/";
}
PocoHttpRequestPtr pPocoHttpRequest = new Poco::Net::HTTPRequest(HttpUtil::httpMethodToString(method),
path, Poco::Net::HTTPMessage::HTTP_1_1);
Headers::Ptr pHeaders = pNetworkRequest->getHeaders();
if (pHeaders) {
for (Headers::HeaderMap::ConstIterator it = pHeaders->begin(); it != pHeaders->end(); it++) {
pPocoHttpRequest->add(it->first, it->second);
}
}
// content-type, content-length
RequestBody::Ptr pRequestBody = pNetworkRequest->getBody();
if (pRequestBody) {
MediaType::Ptr pMediaType = pRequestBody->getMediaType();
if (!pMediaType) {
EASYHTTPCPP_LOG_D(Tag, "sendRequest: content-type is not set. [url=%s]", pNetworkRequest->getUrl().c_str());
} else {
pPocoHttpRequest->set(HttpConstants::HeaderNames::ContentType, pMediaType->toString());
}
if (pRequestBody->hasContentLength()) {
pPocoHttpRequest->set(HttpConstants::HeaderNames::ContentLength,
StringUtil::format("%zu", pRequestBody->getContentLength()));
}
}
// dump request
EASYHTTPCPP_LOG_D(Tag, "Poco HTTPRequest:");
EASYHTTPCPP_LOG_D(Tag, "method=%s", pPocoHttpRequest->getMethod().c_str());
for (Poco::Net::NameValueCollection::ConstIterator it = pPocoHttpRequest->begin();
it != pPocoHttpRequest->end(); it++) {
EASYHTTPCPP_LOG_D(Tag, "%s %s", it->first.c_str(), it->second.c_str());
}
// send request
sentRequestTime.update();
std::ostream& sendingStream = pPocoHttpClientSession->sendRequest(*pPocoHttpRequest);
// send request body
if (pRequestBody) {
pRequestBody->writeTo(sendingStream);
}
EASYHTTPCPP_LOG_D(Tag, "send request.");
} catch (const Poco::TimeoutException& e) {
EASYHTTPCPP_LOG_D(Tag, "sendRequest: sendRequest has timeout [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str());
throw HttpTimeoutException(StringUtil::format("Sending request timed out. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str()), e);
} catch (const Poco::Net::SSLException& e) {
EASYHTTPCPP_LOG_D(Tag,
"sendRequest: SSL exception. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str());
throw HttpSslException(
StringUtil::format("SSL error occurred in sendRequest. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str()), e);
} catch (const Poco::Exception& e) {
EASYHTTPCPP_LOG_D(Tag,
"sendRequest: Poco::Exception occurred. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str());
throw HttpExecutionException(
StringUtil::format("IO error occurred in sendRequest. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str()), e);
}
}
Response::Ptr HttpEngine::receiveResponse(PocoHttpClientSessionPtr pPocoHttpClientSession,
Request::Ptr pNetworkRequest, const Poco::URI& uri, Poco::Timestamp& sentRequestTime)
{
// receive response and create network response
try {
// receive response
PocoHttpResponsePtr pPocoHttpResponse = new Poco::Net::HTTPResponse();
std::istream& receivingStream = pPocoHttpClientSession->receiveResponse(*pPocoHttpResponse);
EASYHTTPCPP_LOG_D(Tag, "receive response.");
Poco::Timestamp receivedResponseTime;
// if receive Connection:Close, remove connection from ConnectionPool.
// if response header does not contain Connection, indicate keep-alive in HTTP1.1.
// this judgment is done by Poco.
if (!pPocoHttpResponse->getKeepAlive()) {
EASYHTTPCPP_LOG_D(Tag, "receiveResponse: receive Connection:Close or no Connection");
m_pConnectionPoolInternal->removeConnection(m_pConnectionInternal);
}
// create networkResponse
ResponseBodyStream::Ptr pResponseBodyStream = new ResponseBodyStreamWithoutCaching(receivingStream,
m_pConnectionInternal, m_pConnectionPoolInternal);
MediaType::Ptr pMediaType(new MediaType(pPocoHttpResponse->get(HttpConstants::HeaderNames::ContentType,
DEFAULT_CONTENT_TYPE)));
ResponseBody::Ptr pResponseBody = ResponseBody::create(pMediaType, pPocoHttpResponse->hasContentLength(),
pPocoHttpResponse->getContentLength(), pResponseBodyStream);
Response::Builder responseBuilder;
responseBuilder.setRequest(pNetworkRequest).setCode(pPocoHttpResponse->getStatus())
.setMessage(pPocoHttpResponse->getReason())
.setHasContentLength(pPocoHttpResponse->hasContentLength())
.setContentLength(pPocoHttpResponse->getContentLength())
.setSentRequestSec(sentRequestTime.epochTime())
.setReceivedResponseSec(receivedResponseTime.epochTime())
.setBody(pResponseBody);
Headers::Ptr pHeaders = new Headers();
for (Poco::Net::NameValueCollection::ConstIterator it = pPocoHttpResponse->begin();
it != pPocoHttpResponse->end(); it++) {
pHeaders->add(it->first, it->second);
}
responseBuilder.setHeaders(pHeaders).setCacheControl(CacheControl::createFromHeaders(pHeaders));
Response::Ptr pNetworkResponse = responseBuilder.build();
// dump response header
EASYHTTPCPP_LOG_D(Tag, "Poco HTTPResponse:");
EASYHTTPCPP_LOG_D(Tag, "status code=%d", pPocoHttpResponse->getStatus());
for (Poco::Net::NameValueCollection::ConstIterator it = pPocoHttpResponse->begin();
it != pPocoHttpResponse->end(); it++) {
EASYHTTPCPP_LOG_D(Tag, "%s %s", it->first.c_str(), it->second.c_str());
}
return pNetworkResponse;
} catch (const Poco::TimeoutException& e) {
EASYHTTPCPP_LOG_D(Tag, "receiveResponse: receiveResponse has timeout [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str());
throw HttpTimeoutException(StringUtil::format("Receiving response timed out. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str()), e);
} catch (const Poco::Net::SSLException& e) {
EASYHTTPCPP_LOG_D(Tag,
"receiveResponse: SSL exception. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str());
throw HttpSslException(
StringUtil::format("SSL error occurred in receiveResponse. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str()), e);
} catch (const Poco::Exception& e) {
EASYHTTPCPP_LOG_D(Tag,
"receiveResponse: Poco::Exception occurred. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str());
throw HttpExecutionException(
StringUtil::format("IO error occurred in receiveResponse. [scheme=%s, host=%s] message=[%s]",
uri.getScheme().c_str(), uri.getHost().c_str(), e.message().c_str()), e);
}
}
bool HttpEngine::cancel()
{
ConnectionInternal::Ptr pConnectionInternal;
{
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
if (m_cancelled) {
EASYHTTPCPP_LOG_D(Tag, "cancel: already cancelled");
return true;
}
m_cancelled = true;
EASYHTTPCPP_LOG_D(Tag, "cancel: cancelled");
pConnectionInternal = m_pConnectionInternal;
}
if (pConnectionInternal) {
bool ret = pConnectionInternal->cancel();
m_pConnectionPoolInternal->removeConnection(pConnectionInternal);
return ret;
}
return m_cancelled;
}
Connection::Ptr HttpEngine::getConnection()
{
return m_pConnectionInternal.unsafeCast<Connection>();
}
void HttpEngine::readAllResponseBodyForCache(Response::Ptr pResponse)
{
if (!m_pContext->getCache()) {
// when no cache, not read response body.
return;
}
ResponseBody::Ptr pResponseBody = pResponse->getBody();
if (!pResponseBody) {
// no response body
return;
}
ResponseBodyStream::Ptr pResponseBodyStream = pResponseBody->getByteStream();
if (!pResponseBodyStream) {
// no response body stream
return;
}
// read all response body for store to cache.
Poco::Buffer<char> responseBodyBuffer(TempResponseBufferBytes);
while (!pResponseBodyStream->isEof()) {
pResponseBodyStream->read(responseBodyBuffer.begin(), TempResponseBufferBytes);
}
pResponseBodyStream->close();
return;
}
ConnectionPool::Ptr HttpEngine::getConnectionPool()
{
return m_pConnectionPoolInternal.unsafeCast<ConnectionPool>();
}
bool HttpEngine::isConnectionRetried()
{
return m_connectionRetried;
}
void HttpEngine::onIdle(ConnectionInternal* pConnectionInternal, bool& listenerInvalidated)
{
// clear reference to Connection.
Poco::FastMutex::ScopedLock lock(m_connectionMutex);
if (m_pConnectionInternal && pConnectionInternal == m_pConnectionInternal.get()) {
m_pConnectionInternal = NULL;
listenerInvalidated = true;
} else {
listenerInvalidated = false;
}
}
Request::Ptr HttpEngine::getRetryRequest(Response::Ptr pResponse)
{
if (!pResponse) {
EASYHTTPCPP_LOG_D(Tag, "getRetryRequest: can not check retry request because pResponse is NULL.");
return NULL;
}
if (!isRetryStatusCode(pResponse)) {
return NULL;
}
if (!EnableRedirect) {
EASYHTTPCPP_LOG_D(Tag, "isRetryContition: disable redirect.");
return NULL;
}
return makeRetryRequest(pResponse);
}
ResponseBody::Ptr HttpEngine::createResponseBodyFromCache(Response::Ptr pCacheResponse)
{
HttpCacheInternal* pCacheInternal = static_cast<HttpCacheInternal*> (m_pContext->getCache().get());
if (pCacheInternal == NULL) {
std::string message = "Can not create response body from cache because no cache.";
EASYHTTPCPP_LOG_D(Tag, "%s", message.c_str());
throw HttpExecutionException(message);
}
std::istream* pStream = pCacheInternal->createInputStreamFromCache(pCacheResponse->getRequest());
if (pStream == NULL) {
EASYHTTPCPP_LOG_D(Tag, "createResponseBodyFromCache: can not create stream from cache.");
throw HttpExecutionException("Can not create response body from cache. Maybe cache is broken.");
}
MediaType::Ptr pMediaType(new MediaType(pCacheResponse->getHeaderValue(
HttpConstants::HeaderNames::ContentType, DEFAULT_CONTENT_TYPE)));
return ResponseBody::create(pMediaType, pCacheResponse->hasContentLength(), pCacheResponse->getContentLength(),
new ResponseBodyStreamFromCache(pStream, pCacheResponse, m_pContext->getCache()));
}
Response::Ptr HttpEngine::createUserResponseFromCacheResponse(Response::Ptr pCacheResponse,
Response::Ptr pNetworkResponse)
{
Headers::Ptr pCombinedHeaders;
if (pNetworkResponse) {
EASYHTTPCPP_LOG_D(Tag, "createUserResponseFromCacheResponse: updateCache");
pCombinedHeaders = HttpCacheStrategy::combineCacheAndNetworkHeader(pCacheResponse, pNetworkResponse);
updateCache(pCacheResponse, pNetworkResponse, pCombinedHeaders);
}
Response::Builder builder(pCacheResponse);
builder.setRequest(m_pUserRequest).setPriorResponse(stripBody(m_pPriorResponse))
.setCacheResponse(stripBody(pCacheResponse)).setBody(createResponseBodyFromCache(pCacheResponse));
if (pNetworkResponse) {
builder.setHeaders(pCombinedHeaders).setNetworkResponse(stripBody(pNetworkResponse))
.setSentRequestSec(pNetworkResponse->getSentRequestSec())
.setReceivedResponseSec(pNetworkResponse->getReceivedResponseSec());
}
return builder.build();
}
Response::Ptr HttpEngine::createUserResponseFromNetworkResponse(Response::Ptr pNetworkResponse)
{
// create UserResponse from NetworkResponse
Response::Builder responseBuilder(pNetworkResponse);
Response::Ptr pUserResponse = responseBuilder.setNetworkResponse(stripBody(pNetworkResponse))
.setPriorResponse(stripBody(m_pPriorResponse)).build();
return pUserResponse;
}
Response::Ptr HttpEngine::createUserResponseWithCaching(Response::Ptr pNetworkResponse)
{
ResponseBody::Ptr pResponseBody = pNetworkResponse->getBody();
ResponseBodyStreamWithoutCaching* pResponseBodyStream =
static_cast<ResponseBodyStreamWithoutCaching*> (pResponseBody->getByteStream().get());
Response::Ptr pStrippedNetworkResponse = stripBody(pNetworkResponse);
// exchange ResponseBodyStreamWithoutCaching to ResponseBodyStreamWithCaching
ResponseBodyStream::Ptr pNewResponseBodyStream = pResponseBodyStream->exchangeToResponseBodyStreamWithCaching(
pStrippedNetworkResponse, m_pContext->getCache());
ResponseBody::Ptr pNewResponseBody = ResponseBody::create(pResponseBody->getMediaType(),
pResponseBody->hasContentLength(), pResponseBody->getContentLength(), pNewResponseBodyStream);
// create UserResponse from NetworkResponse with ResponseBodyStreamWithCaching
Response::Builder responseBuilder(pStrippedNetworkResponse);
Response::Ptr pUserResponse = responseBuilder.setBody(pNewResponseBody)
.setNetworkResponse(pStrippedNetworkResponse).setPriorResponse(stripBody(m_pPriorResponse)).build();
return pUserResponse;
}
void HttpEngine::removeFromCache(Response::Ptr pNetworkResponse)
{
// remove from Cache
HttpCacheInternal* pCacheInternal = static_cast<HttpCacheInternal*> (m_pContext->getCache().get());
if (pCacheInternal != NULL) {
pCacheInternal->remove(pNetworkResponse->getRequest());
}
}
void HttpEngine::updateCache(Response::Ptr pCacheResponse, Response::Ptr pNetworkResponse,
Headers::Ptr pCombinedHeaders)
{
CacheMetadata::Ptr pCacheMetadata;
Request::Ptr pRequest = pCacheResponse->getRequest();
std::string key = HttpUtil::makeCacheKey(pRequest);
if (key.empty()) {
EASYHTTPCPP_LOG_D(Tag, "updateCache: can not make key.");
return;
}
HttpCache::Ptr pHttpCache = m_pContext->getCache();
HttpCacheInternal* pCacheInternal = static_cast<HttpCacheInternal*> (pHttpCache.get());
CacheManager::Ptr pCacheManager = pCacheInternal->getCacheManager();
if (!pCacheManager->getMetadata(key, pCacheMetadata)) {
EASYHTTPCPP_LOG_D(Tag, "updateCache: can not get cache[%s].", key.c_str());
return;
}
HttpCacheMetadata* pHttpCacheMetadata = static_cast<HttpCacheMetadata*> (pCacheMetadata.get());
pHttpCacheMetadata->setResponseHeaders(pCombinedHeaders);
pHttpCacheMetadata->setSentRequestAtEpoch(pNetworkResponse->getSentRequestSec());
pHttpCacheMetadata->setReceivedResponseAtEpoch(pNetworkResponse->getReceivedResponseSec());
Poco::Timestamp now;
pHttpCacheMetadata->setCreatedAtEpoch(now.epochTime());
if (!pCacheManager->putMetadata(key, pCacheMetadata)) {
EASYHTTPCPP_LOG_D(Tag, "updateCache: can not put cache[%s].", pHttpCacheMetadata->getKey().c_str());
}
}
bool HttpEngine::isRetryStatusCode(Response::Ptr pResponse)
{
switch (pResponse->getCode()) {
case Poco::Net::HTTPResponse::HTTP_TEMPORARY_REDIRECT:
case 308: // Permanent Redirect TODO: Future, to change Once enum is defined.
case Poco::Net::HTTPResponse::HTTP_MOVED_PERMANENTLY:
case Poco::Net::HTTPResponse::HTTP_FOUND:
case Poco::Net::HTTPResponse::HTTP_SEE_OTHER:
{
// RFC 2616 10.3 Redirection 3xx
// except GET, HEAD Method need confirm.
switch (pResponse->getRequest()->getMethod()) {
case Request::HttpMethodGet:
case Request::HttpMethodHead:
EASYHTTPCPP_LOG_D(Tag, "isRetryStatusCode: redirect http status [%d]", pResponse->getCode());
return true;
default:
EASYHTTPCPP_LOG_D(Tag, "isRetryStatusCode: redirect method is except GET, HEAD. [%s]",
HttpUtil::httpMethodToString(pResponse->getRequest()->getMethod()).c_str());
return false;
}
}
default:
return false;
}
}
} /* namespace easyhttpcpp */
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