* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/.
*
* (c) ZeroTier, Inc.
* https://www.zerotier.com/
*/
#include "Http.hpp"
#include "../node/Constants.hpp"
#include "../node/Utils.hpp"
#include "OSUtils.hpp"
#include "Phy.hpp"
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#ifdef ZT_USE_SYSTEM_HTTP_PARSER
#include <http_parser.h>
#else
#include "../ext/http-parser/http_parser.h"
#endif
namespace ZeroTier {
namespace {
static int ShttpOnMessageBegin(http_parser* parser);
static int ShttpOnUrl(http_parser* parser, const char* ptr, size_t length);
#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 2)
static int ShttpOnStatus(http_parser* parser, const char* ptr, size_t length);
#else
static int ShttpOnStatus(http_parser* parser);
#endif
static int ShttpOnHeaderField(http_parser* parser, const char* ptr, size_t length);
static int ShttpOnValue(http_parser* parser, const char* ptr, size_t length);
static int ShttpOnHeadersComplete(http_parser* parser);
static int ShttpOnBody(http_parser* parser, const char* ptr, size_t length);
static int ShttpOnMessageComplete(http_parser* parser);
#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 1)
static const struct http_parser_settings HTTP_PARSER_SETTINGS = { ShttpOnMessageBegin, ShttpOnUrl, ShttpOnStatus, ShttpOnHeaderField, ShttpOnValue, ShttpOnHeadersComplete, ShttpOnBody, ShttpOnMessageComplete };
#else
static const struct http_parser_settings HTTP_PARSER_SETTINGS = { ShttpOnMessageBegin, ShttpOnUrl, ShttpOnHeaderField, ShttpOnValue, ShttpOnHeadersComplete, ShttpOnBody, ShttpOnMessageComplete };
#endif
struct HttpPhyHandler {
inline void phyOnDatagram(PhySocket* sock, void** uptr, const struct sockaddr* localAddr, const struct sockaddr* from, void* data, unsigned long len)
{
}
inline void phyOnTcpAccept(PhySocket* sockL, PhySocket* sockN, void** uptrL, void** uptrN, const struct sockaddr* from)
{
}
inline void phyOnTcpConnect(PhySocket* sock, void** uptr, bool success)
{
if (success) {
phy->setNotifyWritable(sock, true);
}
else {
*responseBody = "connection failed";
error = true;
done = true;
}
}
inline void phyOnTcpClose(PhySocket* sock, void** uptr)
{
done = true;
}
inline void phyOnTcpData(PhySocket* sock, void** uptr, void* data, unsigned long len)
{
lastActivity = OSUtils::now();
http_parser_execute(&parser, &HTTP_PARSER_SETTINGS, (const char*)data, len);
if ((parser.upgrade) || (parser.http_errno != HPE_OK))
phy->close(sock);
}
inline void phyOnTcpWritable(PhySocket* sock, void** uptr)
{
if (writePtr < (unsigned long)writeBuf.length()) {
long n = phy->streamSend(sock, writeBuf.data() + writePtr, (unsigned long)writeBuf.length() - writePtr, true);
if (n > 0)
writePtr += n;
}
if (writePtr >= (unsigned long)writeBuf.length())
phy->setNotifyWritable(sock, false);
}
inline void phyOnFileDescriptorActivity(PhySocket* sock, void** uptr, bool readable, bool writable)
{
}
#ifdef __UNIX_LIKE__
inline void phyOnUnixAccept(PhySocket* sockL, PhySocket* sockN, void** uptrL, void** uptrN)
{
}
inline void phyOnUnixClose(PhySocket* sock, void** uptr)
{
}
inline void phyOnUnixData(PhySocket* sock, void** uptr, void* data, unsigned long len)
{
}
inline void phyOnUnixWritable(PhySocket* sock, void** uptr)
{
}
#endif
http_parser parser;
std::string currentHeaderField;
std::string currentHeaderValue;
unsigned long messageSize;
unsigned long writePtr;
uint64_t lastActivity;
std::string writeBuf;
unsigned long maxResponseSize;
std::map<std::string, std::string>* responseHeaders;
std::string* responseBody;
bool error;
bool done;
Phy<HttpPhyHandler*>* phy;
PhySocket* sock;
};
static int ShttpOnMessageBegin(http_parser* parser)
{
return 0;
}
static int ShttpOnUrl(http_parser* parser, const char* ptr, size_t length)
{
return 0;
}
#if (HTTP_PARSER_VERSION_MAJOR >= 2) && (HTTP_PARSER_VERSION_MINOR >= 2)
static int ShttpOnStatus(http_parser* parser, const char* ptr, size_t length)
#else
static int ShttpOnStatus(http_parser* parser)
#endif
{
HttpPhyHandler *hh = reinterpret_cast<HttpPhyHandler *>(parser->data);
hh->messageSize += (unsigned long)length;
if (hh->messageSize > hh->maxResponseSize)
return -1;
*/
return 0;
}
static int ShttpOnHeaderField(http_parser* parser, const char* ptr, size_t length)
{
HttpPhyHandler* hh = reinterpret_cast<HttpPhyHandler*>(parser->data);
hh->messageSize += (unsigned long)length;
if (hh->messageSize > hh->maxResponseSize)
return -1;
if ((hh->currentHeaderField.length()) && (hh->currentHeaderValue.length())) {
(*hh->responseHeaders)[hh->currentHeaderField] = hh->currentHeaderValue;
hh->currentHeaderField = "";
hh->currentHeaderValue = "";
}
for (size_t i = 0; i < length; ++i)
hh->currentHeaderField.push_back(OSUtils::toLower(ptr[i]));
return 0;
}
static int ShttpOnValue(http_parser* parser, const char* ptr, size_t length)
{
HttpPhyHandler* hh = reinterpret_cast<HttpPhyHandler*>(parser->data);
hh->messageSize += (unsigned long)length;
if (hh->messageSize > hh->maxResponseSize)
return -1;
hh->currentHeaderValue.append(ptr, length);
return 0;
}
static int ShttpOnHeadersComplete(http_parser* parser)
{
HttpPhyHandler* hh = reinterpret_cast<HttpPhyHandler*>(parser->data);
if ((hh->currentHeaderField.length()) && (hh->currentHeaderValue.length()))
(*hh->responseHeaders)[hh->currentHeaderField] = hh->currentHeaderValue;
return 0;
}
static int ShttpOnBody(http_parser* parser, const char* ptr, size_t length)
{
HttpPhyHandler* hh = reinterpret_cast<HttpPhyHandler*>(parser->data);
hh->messageSize += (unsigned long)length;
if (hh->messageSize > hh->maxResponseSize)
return -1;
hh->responseBody->append(ptr, length);
return 0;
}
static int ShttpOnMessageComplete(http_parser* parser)
{
HttpPhyHandler* hh = reinterpret_cast<HttpPhyHandler*>(parser->data);
hh->phy->close(hh->sock);
return 0;
}
}
unsigned int Http::_do(
const char* method,
unsigned long maxResponseSize,
unsigned long timeout,
const struct sockaddr* remoteAddress,
const char* path,
const std::map<std::string, std::string>& requestHeaders,
const void* requestBody,
unsigned long requestBodyLength,
std::map<std::string, std::string>& responseHeaders,
std::string& responseBody)
{
try {
responseHeaders.clear();
responseBody = "";
HttpPhyHandler handler;
http_parser_init(&(handler.parser), HTTP_RESPONSE);
handler.parser.data = (void*)&handler;
handler.messageSize = 0;
handler.writePtr = 0;
handler.lastActivity = OSUtils::now();
try {
char tmp[1024];
OSUtils::ztsnprintf(tmp, sizeof(tmp), "%s %s HTTP/1.1\r\n", method, path);
handler.writeBuf.append(tmp);
for (std::map<std::string, std::string>::const_iterator h(requestHeaders.begin()); h != requestHeaders.end(); ++h) {
OSUtils::ztsnprintf(tmp, sizeof(tmp), "%s: %s\r\n", h->first.c_str(), h->second.c_str());
handler.writeBuf.append(tmp);
}
handler.writeBuf.append("\r\n");
if ((requestBody) && (requestBodyLength))
handler.writeBuf.append((const char*)requestBody, requestBodyLength);
}
catch (...) {
responseBody = "request too large";
return 0;
}
if (maxResponseSize) {
handler.maxResponseSize = maxResponseSize;
}
else {
handler.maxResponseSize = 2147483647;
}
handler.responseHeaders = &responseHeaders;
handler.responseBody = &responseBody;
handler.error = false;
handler.done = false;
Phy<HttpPhyHandler*> phy(&handler, true, true);
bool instantConnect = false;
handler.phy = &phy;
handler.sock = phy.tcpConnect((const struct sockaddr*)remoteAddress, instantConnect, (void*)0, true);
if (! handler.sock) {
responseBody = "connection failed (2)";
return 0;
}
while (! handler.done) {
phy.poll(timeout / 2);
if ((timeout) && ((unsigned long)(OSUtils::now() - handler.lastActivity) > timeout)) {
phy.close(handler.sock);
responseBody = "timed out";
return 0;
}
}
return ((handler.error) ? 0 : ((handler.parser.http_errno != HPE_OK) ? 0 : handler.parser.status_code));
}
catch (std::exception& exc) {
responseBody = exc.what();
return 0;
}
catch (...) {
responseBody = "unknown exception";
return 0;
}
}
}