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HTTP: 优化http客户端代码，并修复重定向时超时的bug: #1306

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This commit is contained in:
ziyue 2021-12-24 11:22:17 +08:00
parent 4e01c29833
commit f89abfaf67
3 changed files with 73 additions and 78 deletions
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130
src/Http/HttpClient.cpp
View File

@ -15,28 +15,28 @@
namespace mediakit {
void HttpClient::sendRequest(const string &strUrl, float fTimeOutSec) {
_aliveTicker.resetTime();
_url = strUrl;
auto protocol = FindField(strUrl.data(), NULL, "://");
uint16_t defaultPort;
bool isHttps;
void HttpClient::sendRequest(const string &url, float timeout_sec) {
clearResponse();
_url = url;
auto protocol = FindField(url.data(), NULL, "://");
uint16_t default_port;
bool is_https;
if (strcasecmp(protocol.data(), "http") == 0) {
defaultPort = 80;
isHttps = false;
default_port = 80;
is_https = false;
} else if (strcasecmp(protocol.data(), "https") == 0) {
defaultPort = 443;
isHttps = true;
default_port = 443;
is_https = true;
} else {
auto strErr = StrPrinter << "非法的http url:" << strUrl << endl;
auto strErr = StrPrinter << "非法的http url:" << url << endl;
throw std::invalid_argument(strErr);
}
auto host = FindField(strUrl.data(), "://", "/");
auto host = FindField(url.data(), "://", "/");
if (host.empty()) {
host = FindField(strUrl.data(), "://", NULL);
host = FindField(url.data(), "://", NULL);
}
_path = FindField(strUrl.data(), host.data(), NULL);
_path = FindField(url.data(), host.data(), NULL);
if (_path.empty()) {
_path = "/";
}
@ -51,30 +51,28 @@ void HttpClient::sendRequest(const string &strUrl, float fTimeOutSec) {
uint16_t port = atoi(FindField(host.data(), ":", NULL).data());
if (port <= 0) {
//默认端口
port = defaultPort;
port = default_port;
} else {
//服务器域名
host = FindField(host.data(), NULL, ":");
}
_header.emplace("Host", host_header);
_header.emplace("Tools", kServerName);
_header.emplace("User-Agent", kServerName);
_header.emplace("Connection", "keep-alive");
_header.emplace("Accept", "*/*");
_header.emplace("Accept-Language", "zh-CN,zh;q=0.8");
_header.emplace("User-Agent",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36");
if (_body && _body->remainSize()) {
_header.emplace("Content-Length", to_string(_body->remainSize()));
_header.emplace("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
}
bool bChanged = (_lastHost != host + ":" + to_string(port)) || (_isHttps != isHttps);
_lastHost = host + ":" + to_string(port);
_isHttps = isHttps;
_fTimeOutSec = fTimeOutSec;
bool host_changed = (_last_host != host + ":" + to_string(port)) || (_is_https != is_https);
_last_host = host + ":" + to_string(port);
_is_https = is_https;
_timeout_second = timeout_sec;
auto cookies = HttpCookieStorage::Instance().get(_lastHost, _path);
auto cookies = HttpCookieStorage::Instance().get(_last_host, _path);
_StrPrinter printer;
for (auto &cookie : cookies) {
printer << cookie->getKey() << "=" << cookie->getVal() << ";";
@ -84,8 +82,8 @@ void HttpClient::sendRequest(const string &strUrl, float fTimeOutSec) {
_header.emplace("Cookie", printer);
}
if (!alive() || bChanged) {
startConnect(host, port, fTimeOutSec);
if (!alive() || host_changed) {
startConnect(host, port, timeout_sec);
} else {
SockException ex;
onConnect_l(ex);
@ -98,17 +96,16 @@ void HttpClient::clear() {
_body.reset();
_method.clear();
_path.clear();
_aliveTicker.resetTime();
_chunkedSplitter.reset();
_fTimeOutSec = 0;
clearResponse();
}
void HttpClient::clearResponse() {
_recvedBodySize = 0;
_totalBodySize = 0;
_recved_body_size = 0;
_total_body_size = 0;
_parser.Clear();
_chunkedSplitter = nullptr;
_chunked_splitter = nullptr;
_recv_timeout_ticker.resetTime();
_total_timeout_ticker.resetTime();
HttpRequestSplitter::reset();
}
@ -150,14 +147,12 @@ void HttpClient::onConnect(const SockException &ex) {
}
void HttpClient::onConnect_l(const SockException &ex) {
_aliveTicker.resetTime();
_recv_timeout_ticker.resetTime();
if (ex) {
onDisconnect(ex);
return;
}
clearResponse();
_StrPrinter printer;
printer << _method + " " << _path + " HTTP/1.1\r\n";
for (auto &pr : _header) {
@ -169,12 +164,12 @@ void HttpClient::onConnect_l(const SockException &ex) {
}
void HttpClient::onRecv(const Buffer::Ptr &pBuf) {
_aliveTicker.resetTime();
_recv_timeout_ticker.resetTime();
HttpRequestSplitter::input(pBuf->data(), pBuf->size());
}
void HttpClient::onErr(const SockException &ex) {
if (ex.getErrCode() == Err_eof && _totalBodySize < 0) {
if (ex.getErrCode() == Err_eof && _total_body_size < 0) {
//如果Content-Length未指定 但服务器断开链接
//则认为本次http请求完成
onResponseCompleted_l();
@ -185,42 +180,41 @@ void HttpClient::onErr(const SockException &ex) {
ssize_t HttpClient::onRecvHeader(const char *data, size_t len) {
_parser.Parse(data);
if (_parser.Url() == "302" || _parser.Url() == "301") {
auto newUrl = _parser["Location"];
if (newUrl.empty()) {
auto new_url = _parser["Location"];
if (new_url.empty()) {
shutdown(SockException(Err_shutdown, "未找到Location字段(跳转url)"));
return 0;
}
if (onRedirectUrl(newUrl, _parser.Url() == "302")) {
HttpClient::clear();
if (onRedirectUrl(new_url, _parser.Url() == "302")) {
setMethod("GET");
HttpClient::sendRequest(newUrl, _fTimeOutSec);
HttpClient::sendRequest(new_url, _timeout_second);
return 0;
}
}
checkCookie(_parser.getHeader());
_totalBodySize = onResponseHeader(_parser.Url(), _parser.getHeader());
_total_body_size = onResponseHeader(_parser.Url(), _parser.getHeader());
if (!_parser["Content-Length"].empty()) {
//有Content-Length字段时忽略onResponseHeader的返回值
_totalBodySize = atoll(_parser["Content-Length"].data());
_total_body_size = atoll(_parser["Content-Length"].data());
}
if (_parser["Transfer-Encoding"] == "chunked") {
//如果Transfer-Encoding字段等于chunked，则认为后续的content是不限制长度的
_totalBodySize = -1;
_chunkedSplitter = std::make_shared<HttpChunkedSplitter>([this](const char *data, size_t len) {
_total_body_size = -1;
_chunked_splitter = std::make_shared<HttpChunkedSplitter>([this](const char *data, size_t len) {
if (len > 0) {
auto recvedBodySize = _recvedBodySize + len;
onResponseBody(data, len, recvedBodySize, SIZE_MAX);
_recvedBodySize = recvedBodySize;
auto recved_body_size = _recved_body_size + len;
onResponseBody(data, len, recved_body_size, SIZE_MAX);
_recved_body_size = recved_body_size;
} else {
onResponseCompleted_l();
}
});
}
if (_totalBodySize == 0) {
if (_total_body_size == 0) {
//后续没content，本次http请求结束
onResponseCompleted_l();
return 0;
@ -230,46 +224,46 @@ ssize_t HttpClient::onRecvHeader(const char *data, size_t len) {
//虽然我们在_totalBodySize >0 时知道content的确切大小，
//但是由于我们没必要等content接收完毕才回调onRecvContent(因为这样浪费内存并且要多次拷贝数据)
//所以返回-1代表我们接下来分段接收content
_recvedBodySize = 0;
_recved_body_size = 0;
return -1;
}
void HttpClient::onRecvContent(const char *data, size_t len) {
if (_chunkedSplitter) {
_chunkedSplitter->input(data, len);
if (_chunked_splitter) {
_chunked_splitter->input(data, len);
return;
}
auto recvedBodySize = _recvedBodySize + len;
if (_totalBodySize < 0) {
auto recved_body_size = _recved_body_size + len;
if (_total_body_size < 0) {
//不限长度的content,最大支持SIZE_MAX个字节
onResponseBody(data, len, recvedBodySize, SIZE_MAX);
_recvedBodySize = recvedBodySize;
onResponseBody(data, len, recved_body_size, SIZE_MAX);
_recved_body_size = recved_body_size;
return;
}
//固定长度的content
if (recvedBodySize < (size_t) _totalBodySize) {
if (recved_body_size < (size_t) _total_body_size) {
//content还未接收完毕
onResponseBody(data, len, recvedBodySize, _totalBodySize);
_recvedBodySize = recvedBodySize;
onResponseBody(data, len, recved_body_size, _total_body_size);
_recved_body_size = recved_body_size;
return;
}
//content接收完毕
onResponseBody(data, _totalBodySize - _recvedBodySize, _totalBodySize, _totalBodySize);
bool biggerThanExpected = recvedBodySize > (size_t) _totalBodySize;
onResponseBody(data, _total_body_size - _recved_body_size, _total_body_size, _total_body_size);
bool bigger_than_expected = recved_body_size > (size_t) _total_body_size;
onResponseCompleted_l();
if (biggerThanExpected) {
if (bigger_than_expected) {
//声明的content数据比真实的小，那么我们只截取前面部分的并断开链接
shutdown(SockException(Err_shutdown, "http response content size bigger than expected"));
}
}
void HttpClient::onFlush() {
_aliveTicker.resetTime();
GET_CONFIG(uint32_t, sendBufSize, Http::kSendBufSize);
_recv_timeout_ticker.resetTime();
GET_CONFIG(uint32_t, send_buf_size, Http::kSendBufSize);
while (_body && _body->remainSize() && !isSocketBusy()) {
auto buffer = _body->readData(sendBufSize);
auto buffer = _body->readData(send_buf_size);
if (!buffer) {
//数据发送结束或读取数据异常
break;
@ -283,13 +277,13 @@ void HttpClient::onFlush() {
}
void HttpClient::onManager() {
if (_aliveTicker.elapsedTime() > 3 * 1000 && _totalBodySize < 0 && !_chunkedSplitter) {
if (_recv_timeout_ticker.elapsedTime() > 3 * 1000 && _total_body_size < 0 && !_chunked_splitter) {
//如果Content-Length未指定 但接收数据超时
//则认为本次http请求完成
onResponseCompleted_l();
}
if (_fTimeOutSec > 0 && _aliveTicker.elapsedTime() > _fTimeOutSec * 1000) {
if (_timeout_second > 0 && _total_timeout_ticker.elapsedTime() > _timeout_second * 1000) {
//超时
shutdown(SockException(Err_timeout, "http request timeout"));
}
@ -304,7 +298,7 @@ void HttpClient::checkCookie(HttpClient::HttpHeader &headers) {
for (auto it_set_cookie = headers.find("Set-Cookie"); it_set_cookie != headers.end(); ++it_set_cookie) {
auto key_val = Parser::parseArgs(it_set_cookie->second, ";", "=");
HttpCookie::Ptr cookie = std::make_shared<HttpCookie>();
cookie->setHost(_lastHost);
cookie->setHost(_last_host);
int index = 0;
auto arg_vec = split(it_set_cookie->second, ";");

19
src/Http/HttpClient.h
View File

@ -61,9 +61,9 @@ public:
/**
* 发送http[s]请求
* @param url 请求url
* @param fTimeOutSec 超时时间
* @param timeout_sec 超时时间
*/
virtual void sendRequest(const string &url, float fTimeOutSec);
virtual void sendRequest(const string &url, float timeout_sec);
/**
* 重置对象
@ -170,7 +170,7 @@ private:
void clearResponse();
protected:
bool _isHttps;
bool _is_https;
private:
string _url;
@ -178,15 +178,16 @@ private:
HttpBody::Ptr _body;
string _method;
string _path;
string _lastHost;
Ticker _aliveTicker;
float _fTimeOutSec = 0;
string _last_host;
Ticker _recv_timeout_ticker;
Ticker _total_timeout_ticker;
float _timeout_second = 0;
//recv
size_t _recvedBodySize;
ssize_t _totalBodySize;
size_t _recved_body_size;
ssize_t _total_body_size;
Parser _parser;
std::shared_ptr<HttpChunkedSplitter> _chunkedSplitter;
std::shared_ptr<HttpChunkedSplitter> _chunked_splitter;
};
} /* namespace mediakit */

2
src/Http/HttpClientImp.cpp
View File

@ -13,7 +13,7 @@
namespace mediakit {
void HttpClientImp::onConnect(const SockException &ex) {
if(!_isHttps){
if(!_is_https){
HttpClient::onConnect(ex);
} else {
TcpClientWithSSL<HttpClient>::onConnect(ex);