Tagging the 0.2.0 release of aria2

1 files changed, 149 insertions, 0 deletions

diff --git a/trunk/src/HttpResponseCommand.cc b/trunk/src/HttpResponseCommand.cc
new file mode 100644
index 00000000..22c7fa71
--- /dev/null
+++ b/trunk/src/HttpResponseCommand.cc
@@ -0,0 +1,149 @@
+/* <!-- copyright */
+/*
+ * aria2 - a simple utility for downloading files faster
+ *
+ * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+/* copyright --> */
+#include "HttpResponseCommand.h"
+#include "DlAbortEx.h"
+#include "HttpDownloadCommand.h"
+#include "HttpInitiateConnectionCommand.h"
+#include "message.h"
+#include "Util.h"
+
+HttpResponseCommand::HttpResponseCommand(int cuid, Request* req, DownloadEngine* e, Socket* s):
+  AbstractCommand(cuid, req, e, s) {
+  AbstractCommand::checkSocketIsReadable = true;
+}
+
+HttpResponseCommand::~HttpResponseCommand() {}
+
+bool HttpResponseCommand::executeInternal(Segment seg) {
+  if(SEGMENT_EQUAL(req->seg, seg) == false) {
+    e->logger->info(MSG_SEGMENT_CHANGED, cuid);
+    return prepareForRetry(0);
+  }
+  HttpHeader headers;
+  HttpConnection httpConnection(cuid, socket, e->option, e->logger);
+  int status = httpConnection.receiveResponse(headers);
+  // check HTTP status number
+  checkResponse(status, seg);
+  retrieveCookie(headers);
+  // check whether Location header exists. If it does, update request object
+  // with redirected URL.
+  // then establish a connection to the new host and port
+  if(headers.count("Location")) {
+    return handleRedirect((*headers.find("Location")).second, headers);
+  }
+  if(!e->segmentMan->downloadStarted) {
+    string transferEncoding;
+    headers.find("Transfer-Encoding");
+    if(headers.count("Transfer-Encoding")) {
+      return handleOtherEncoding((*headers.find("Transfer-Encoding")).second, headers);
+    } else {
+      return handleDefaultEncoding(headers);
+    }
+  } else {
+    if(req->getFile() != e->segmentMan->filename) {
+      throw new DlAbortEx(EX_FILENAME_MISMATCH, req->getFile().c_str(), e->segmentMan->filename.c_str());
+    }
+    createHttpDownloadCommand();
+    return true;
+  }
+}
+
+void HttpResponseCommand::checkResponse(int status, const Segment& segment) {
+    if(!(status < 400 && status >= 300 ||
+	 (segment.sp+segment.ds == 0 && status == 200)
+	 || (segment.sp+segment.ds > 0 &&  status == 206))) {
+      throw new DlAbortEx(EX_BAD_STATUS, status);
+    }
+}
+
+bool HttpResponseCommand::handleRedirect(string url, const HttpHeader& headers) {
+  req->redirectUrl(url);
+  e->logger->info(MSG_REDIRECT, cuid, url.c_str());
+  e->noWait = true;
+  return prepareForRetry(0);
+}
+
+bool HttpResponseCommand::handleDefaultEncoding(const HttpHeader& headers) {
+  long long int size;
+  if(headers.count("Content-Length") == 0) {
+    size = 0;
+  } else {
+    size = STRTOLL((*headers.find("Content-Length")).second.c_str());
+    if(size == LONG_LONG_MAX || size == LONG_LONG_MIN) {
+      throw new DlAbortEx(EX_TOO_LARGE_FILE, size);
+    }
+  }
+  e->segmentMan->isSplittable = !(size == 0);
+  e->segmentMan->filename = req->getFile();
+  e->segmentMan->totalSize = size;
+  bool segFileExists = e->segmentMan->segmentFileExists();
+  e->segmentMan->downloadStarted = true;
+  if(segFileExists) {
+    e->segmentMan->load();
+    e->diskWriter->openExistingFile(e->segmentMan->getFilePath());
+    // send request again to the server with Range header
+    return prepareForRetry(0);
+  } else {
+    Segment seg;
+    e->segmentMan->getSegment(seg, cuid);	
+    e->diskWriter->initAndOpenFile(e->segmentMan->getFilePath());
+    createHttpDownloadCommand();
+    return true;
+  }
+}
+
+bool HttpResponseCommand::handleOtherEncoding(string transferEncoding, const HttpHeader& headers) {
+  // we ignore content-length when transfer-encoding is set
+  e->segmentMan->downloadStarted = true;
+  e->segmentMan->isSplittable = false;
+  e->segmentMan->filename = req->getFile();
+  e->segmentMan->totalSize = 0;
+  Segment seg;
+  e->segmentMan->getSegment(seg, cuid);	
+  e->diskWriter->initAndOpenFile(e->segmentMan->getFilePath());
+  createHttpDownloadCommand(transferEncoding);
+  return true;
+}
+
+void HttpResponseCommand::createHttpDownloadCommand(string transferEncoding) {
+  HttpDownloadCommand* command = new HttpDownloadCommand(cuid, req, e, socket);
+  TransferEncoding* enc = NULL;
+  if(transferEncoding.size() && (enc = command->getTransferEncoding(transferEncoding)) == NULL) {
+    delete(command);
+    throw new DlAbortEx(EX_TRANSFER_ENCODING_NOT_SUPPORTED, transferEncoding.c_str());
+  } else {
+    if(enc != NULL) {
+      command->transferEncoding = transferEncoding;
+      enc->init();
+    }
+    e->commands.push(command);
+  }
+}
+
+void HttpResponseCommand::retrieveCookie(const HttpHeader& headers) {
+  for(HttpHeader::const_iterator itr = headers.find("Set-Cookie"); itr != headers.end(); itr++) {
+    Cookie c;
+    req->cookieBox->parse(c, (*itr).second);
+    req->cookieBox->add(c);
+  }
+}
+