Thrift now a TLP - INFRA-3116
git-svn-id: https://svn.apache.org/repos/asf/thrift/branches/0.1.x@1028168 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/cpp/src/transport/THttpClient.cpp b/lib/cpp/src/transport/THttpClient.cpp
new file mode 100644
index 0000000..59f2339
--- /dev/null
+++ b/lib/cpp/src/transport/THttpClient.cpp
@@ -0,0 +1,348 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <cstdlib>
+#include <sstream>
+
+#include "THttpClient.h"
+#include "TSocket.h"
+
+namespace apache { namespace thrift { namespace transport {
+
+using namespace std;
+
+/**
+ * Http client implementation.
+ *
+ */
+
+// Yeah, yeah, hacky to put these here, I know.
+static const char* CRLF = "\r\n";
+static const int CRLF_LEN = 2;
+
+THttpClient::THttpClient(boost::shared_ptr<TTransport> transport, string host, string path) :
+ transport_(transport),
+ host_(host),
+ path_(path),
+ readHeaders_(true),
+ chunked_(false),
+ chunkedDone_(false),
+ chunkSize_(0),
+ contentLength_(0),
+ httpBuf_(NULL),
+ httpPos_(0),
+ httpBufLen_(0),
+ httpBufSize_(1024) {
+ init();
+}
+
+THttpClient::THttpClient(string host, int port, string path) :
+ host_(host),
+ path_(path),
+ readHeaders_(true),
+ chunked_(false),
+ chunkedDone_(false),
+ chunkSize_(0),
+ contentLength_(0),
+ httpBuf_(NULL),
+ httpPos_(0),
+ httpBufLen_(0),
+ httpBufSize_(1024) {
+ transport_ = boost::shared_ptr<TTransport>(new TSocket(host, port));
+ init();
+}
+
+void THttpClient::init() {
+ httpBuf_ = (char*)std::malloc(httpBufSize_+1);
+ if (httpBuf_ == NULL) {
+ throw TTransportException("Out of memory.");
+ }
+ httpBuf_[httpBufLen_] = '\0';
+}
+
+THttpClient::~THttpClient() {
+ if (httpBuf_ != NULL) {
+ std::free(httpBuf_);
+ }
+}
+
+uint32_t THttpClient::read(uint8_t* buf, uint32_t len) {
+ if (readBuffer_.available_read() == 0) {
+ readBuffer_.resetBuffer();
+ uint32_t got = readMoreData();
+ if (got == 0) {
+ return 0;
+ }
+ }
+ return readBuffer_.read(buf, len);
+}
+
+void THttpClient::readEnd() {
+ // Read any pending chunked data (footers etc.)
+ if (chunked_) {
+ while (!chunkedDone_) {
+ readChunked();
+ }
+ }
+}
+
+uint32_t THttpClient::readMoreData() {
+ // Get more data!
+ refill();
+
+ if (readHeaders_) {
+ readHeaders();
+ }
+
+ if (chunked_) {
+ return readChunked();
+ } else {
+ return readContent(contentLength_);
+ }
+}
+
+uint32_t THttpClient::readChunked() {
+ uint32_t length = 0;
+
+ char* line = readLine();
+ uint32_t chunkSize = parseChunkSize(line);
+ if (chunkSize == 0) {
+ readChunkedFooters();
+ } else {
+ // Read data content
+ length += readContent(chunkSize);
+ // Read trailing CRLF after content
+ readLine();
+ }
+ return length;
+}
+
+void THttpClient::readChunkedFooters() {
+ // End of data, read footer lines until a blank one appears
+ while (true) {
+ char* line = readLine();
+ if (strlen(line) == 0) {
+ chunkedDone_ = true;
+ break;
+ }
+ }
+}
+
+uint32_t THttpClient::parseChunkSize(char* line) {
+ char* semi = strchr(line, ';');
+ if (semi != NULL) {
+ *semi = '\0';
+ }
+ int size = 0;
+ sscanf(line, "%x", &size);
+ return (uint32_t)size;
+}
+
+uint32_t THttpClient::readContent(uint32_t size) {
+ uint32_t need = size;
+ while (need > 0) {
+ uint32_t avail = httpBufLen_ - httpPos_;
+ if (avail == 0) {
+ // We have given all the data, reset position to head of the buffer
+ httpPos_ = 0;
+ httpBufLen_ = 0;
+ refill();
+
+ // Now have available however much we read
+ avail = httpBufLen_;
+ }
+ uint32_t give = avail;
+ if (need < give) {
+ give = need;
+ }
+ readBuffer_.write((uint8_t*)(httpBuf_+httpPos_), give);
+ httpPos_ += give;
+ need -= give;
+ }
+ return size;
+}
+
+char* THttpClient::readLine() {
+ while (true) {
+ char* eol = NULL;
+
+ eol = strstr(httpBuf_+httpPos_, CRLF);
+
+ // No CRLF yet?
+ if (eol == NULL) {
+ // Shift whatever we have now to front and refill
+ shift();
+ refill();
+ } else {
+ // Return pointer to next line
+ *eol = '\0';
+ char* line = httpBuf_+httpPos_;
+ httpPos_ = (eol-httpBuf_) + CRLF_LEN;
+ return line;
+ }
+ }
+
+}
+
+void THttpClient::shift() {
+ if (httpBufLen_ > httpPos_) {
+ // Shift down remaining data and read more
+ uint32_t length = httpBufLen_ - httpPos_;
+ memmove(httpBuf_, httpBuf_+httpPos_, length);
+ httpBufLen_ = length;
+ } else {
+ httpBufLen_ = 0;
+ }
+ httpPos_ = 0;
+ httpBuf_[httpBufLen_] = '\0';
+}
+
+void THttpClient::refill() {
+ uint32_t avail = httpBufSize_ - httpBufLen_;
+ if (avail <= (httpBufSize_ / 4)) {
+ httpBufSize_ *= 2;
+ httpBuf_ = (char*)std::realloc(httpBuf_, httpBufSize_+1);
+ if (httpBuf_ == NULL) {
+ throw TTransportException("Out of memory.");
+ }
+ }
+
+ // Read more data
+ uint32_t got = transport_->read((uint8_t*)(httpBuf_+httpBufLen_), httpBufSize_-httpBufLen_);
+ httpBufLen_ += got;
+ httpBuf_[httpBufLen_] = '\0';
+
+ if (got == 0) {
+ throw TTransportException("Could not refill buffer");
+ }
+}
+
+void THttpClient::readHeaders() {
+ // Initialize headers state variables
+ contentLength_ = 0;
+ chunked_ = false;
+ chunkedDone_ = false;
+ chunkSize_ = 0;
+
+ // Control state flow
+ bool statusLine = true;
+ bool finished = false;
+
+ // Loop until headers are finished
+ while (true) {
+ char* line = readLine();
+
+ if (strlen(line) == 0) {
+ if (finished) {
+ readHeaders_ = false;
+ return;
+ } else {
+ // Must have been an HTTP 100, keep going for another status line
+ statusLine = true;
+ }
+ } else {
+ if (statusLine) {
+ statusLine = false;
+ finished = parseStatusLine(line);
+ } else {
+ parseHeader(line);
+ }
+ }
+ }
+}
+
+bool THttpClient::parseStatusLine(char* status) {
+ char* http = status;
+
+ char* code = strchr(http, ' ');
+ if (code == NULL) {
+ throw TTransportException(string("Bad Status: ") + status);
+ }
+
+ *code = '\0';
+ while (*(code++) == ' ');
+
+ char* msg = strchr(code, ' ');
+ if (msg == NULL) {
+ throw TTransportException(string("Bad Status: ") + status);
+ }
+ *msg = '\0';
+
+ if (strcmp(code, "200") == 0) {
+ // HTTP 200 = OK, we got the response
+ return true;
+ } else if (strcmp(code, "100") == 0) {
+ // HTTP 100 = continue, just keep reading
+ return false;
+ } else {
+ throw TTransportException(string("Bad Status: ") + status);
+ }
+}
+
+void THttpClient::parseHeader(char* header) {
+ char* colon = strchr(header, ':');
+ if (colon == NULL) {
+ return;
+ }
+ uint32_t sz = colon - header;
+ char* value = colon+1;
+
+ if (strncmp(header, "Transfer-Encoding", sz) == 0) {
+ if (strstr(value, "chunked") != NULL) {
+ chunked_ = true;
+ }
+ } else if (strncmp(header, "Content-Length", sz) == 0) {
+ chunked_ = false;
+ contentLength_ = atoi(value);
+ }
+}
+
+void THttpClient::write(const uint8_t* buf, uint32_t len) {
+ writeBuffer_.write(buf, len);
+}
+
+void THttpClient::flush() {
+ // Fetch the contents of the write buffer
+ uint8_t* buf;
+ uint32_t len;
+ writeBuffer_.getBuffer(&buf, &len);
+
+ // Construct the HTTP header
+ std::ostringstream h;
+ h <<
+ "POST " << path_ << " HTTP/1.1" << CRLF <<
+ "Host: " << host_ << CRLF <<
+ "Content-Type: application/x-thrift" << CRLF <<
+ "Content-Length: " << len << CRLF <<
+ "Accept: application/x-thrift" << CRLF <<
+ "User-Agent: C++/THttpClient" << CRLF <<
+ CRLF;
+ string header = h.str();
+
+ // Write the header, then the data, then flush
+ transport_->write((const uint8_t*)header.c_str(), header.size());
+ transport_->write(buf, len);
+ transport_->flush();
+
+ // Reset the buffer and header variables
+ writeBuffer_.resetBuffer();
+ readHeaders_ = true;
+}
+
+}}} // apache::thrift::transport