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-rw-r--r--src/net/download.cpp295
-rw-r--r--src/net/download.h108
2 files changed, 403 insertions, 0 deletions
diff --git a/src/net/download.cpp b/src/net/download.cpp
new file mode 100644
index 00000000..a2368d85
--- /dev/null
+++ b/src/net/download.cpp
@@ -0,0 +1,295 @@
+/*
+ * The Mana World
+ * Copyright (C) 2009 The Mana World Development Team
+ *
+ * This file is part of The Mana World.
+ *
+ * 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
+ * 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
+ */
+
+#include "net/download.h"
+
+#include "log.h"
+#include "main.h"
+
+#include <SDL.h>
+#include <SDL_thread.h>
+
+#include <curl/curl.h>
+#include <zlib.h>
+
+const char *DOWNLOAD_ERROR_MESSAGE_THREAD = "Could not create download thread!";
+
+/**
+ * Calculates the Alder-32 checksum for the given file.
+ */
+static unsigned long fadler32(FILE *file)
+{
+ // Obtain file size
+ fseek(file, 0, SEEK_END);
+ long fileSize = ftell(file);
+ rewind(file);
+
+ // Calculate Adler-32 checksum
+ char *buffer = (char*) malloc(fileSize);
+ const size_t read = fread(buffer, 1, fileSize, file);
+ unsigned long adler = adler32(0L, Z_NULL, 0);
+ adler = adler32(adler, (Bytef*) buffer, read);
+ free(buffer);
+
+ return adler;
+}
+
+enum {
+ OPTIONS_NONE = 0,
+ OPTIONS_MEMORY = 1
+};
+
+namespace Net{
+Download::Download(void *ptr, const std::string &url,
+ DownloadUpdate updateFunction):
+ mPtr(ptr),
+ mUrl(url),
+ mFileName(""),
+ mWriteFunction(NULL),
+ mUpdateFunction(updateFunction),
+ mThread(NULL),
+ mCurl(NULL),
+ mHeaders(NULL)
+
+{
+ mError = (char*) malloc(CURL_ERROR_SIZE);
+ mError[0] = 0;
+
+ mOptions.cancel = false;
+}
+
+Download::~Download()
+{
+ delete mError;
+
+ if (mHeaders)
+ curl_slist_free_all(mHeaders);
+}
+
+void Download::addHeader(const std::string &header)
+{
+ mHeaders = curl_slist_append(mHeaders, header.c_str());
+}
+
+void Download::noCache()
+{
+ addHeader("pragma: no-cache");
+ addHeader("Cache-Control: no-cache");
+}
+
+void Download::setFile(const std::string &filename, Sint64 adler32)
+{
+ mOptions.memoryWrite = false;
+ mFileName = filename;
+
+ if (adler32 > -1)
+ {
+ mAdler = (unsigned long) adler32;
+ mOptions.checkAdler = true;
+ }
+ else
+ mOptions.checkAdler = false;
+}
+
+void Download::setWriteFunction(WriteFunction write)
+{
+ mOptions.memoryWrite = true;
+ mWriteFunction = write;
+}
+
+bool Download::start()
+{
+ logger->log("Starting download: %s\n", mUrl.c_str());
+
+ mThread = SDL_CreateThread(downloadThread, this);
+
+ if (!mThread)
+ {
+ logger->log(DOWNLOAD_ERROR_MESSAGE_THREAD);
+ strcpy(mError, DOWNLOAD_ERROR_MESSAGE_THREAD);
+ mUpdateFunction(mPtr, DOWNLOAD_STATUS_THREAD_ERROR, 0, 0);
+
+ return false;
+ }
+
+ return true;
+}
+
+void Download::cancel()
+{
+ logger->log("Canceling download: %s\n", mUrl.c_str());
+ mOptions.cancel = true;
+}
+
+char *Download::getError()
+{
+ return mError;
+}
+
+int Download::downloadProgress(void *clientp, double dltotal, double dlnow,
+ double ultotal, double ulnow)
+{
+ Download *d = reinterpret_cast<Download*>(clientp);
+
+ if (d->mOptions.cancel)
+ {
+ return d->mUpdateFunction(d->mPtr, DOWNLOAD_STATUS_CANCELLED, dltotal,
+ dlnow);
+ return -5;
+ }
+
+ return d->mUpdateFunction(d->mPtr, DOWNLOAD_STATUS_IDLE, dltotal, dlnow);
+}
+
+int Download::downloadThread(void *ptr)
+{
+ int attempts = 0;
+ bool complete = false;
+ Download *d = reinterpret_cast<Download*>(ptr);
+ CURLcode res;
+ std::string outFilename;
+
+ if (!d->mOptions.memoryWrite)
+ {
+ outFilename = d->mFileName + ".part";
+ }
+
+ while (attempts < 3 && !complete)
+ {
+ FILE *file = NULL;
+
+ d->mUpdateFunction(d->mPtr, DOWNLOAD_STATUS_STARTING, 0, 0);
+
+ d->mCurl = curl_easy_init();
+
+ if (d->mCurl)
+ {
+ logger->log("Downloading: %s", d->mUrl.c_str());
+
+ curl_easy_setopt(d->mCurl, CURLOPT_HTTPHEADER, d->mHeaders);
+
+ if (d->mOptions.memoryWrite)
+ {
+ curl_easy_setopt(d->mCurl, CURLOPT_FAILONERROR, 1);
+ curl_easy_setopt(d->mCurl, CURLOPT_WRITEFUNCTION, d->mWriteFunction);
+ curl_easy_setopt(d->mCurl, CURLOPT_WRITEDATA, d->mPtr);
+ }
+ else
+ {
+ file = fopen(outFilename.c_str(), "w+b");
+ curl_easy_setopt(d->mCurl, CURLOPT_WRITEDATA, file);
+ }
+
+#ifdef PACKAGE_VERSION
+ curl_easy_setopt(d->mCurl, CURLOPT_USERAGENT, "TMW/" PACKAGE_VERSION);
+#else
+ curl_easy_setopt(d->mCurl, CURLOPT_USERAGENT, "TMW");
+#endif
+ curl_easy_setopt(d->mCurl, CURLOPT_ERRORBUFFER, d->mError);
+ curl_easy_setopt(d->mCurl, CURLOPT_URL, d->mUrl.c_str());
+ curl_easy_setopt(d->mCurl, CURLOPT_NOPROGRESS, 0);
+ curl_easy_setopt(d->mCurl, CURLOPT_PROGRESSFUNCTION, downloadProgress);
+ curl_easy_setopt(d->mCurl, CURLOPT_PROGRESSDATA, ptr);
+ curl_easy_setopt(d->mCurl, CURLOPT_NOSIGNAL, 1);
+ curl_easy_setopt(d->mCurl, CURLOPT_CONNECTTIMEOUT, 15);
+
+ if ((res = curl_easy_perform(d->mCurl)) != 0)
+ {
+ switch (res)
+ {
+ case CURLE_COULDNT_CONNECT:
+ default:
+ logger->log("curl error %d: %s host: %s",
+ res, d->mError, d->mUrl.c_str());
+ break;
+ }
+
+ d->mUpdateFunction(d->mPtr, DOWNLOAD_STATUS_ERROR, 0, 0);
+
+ if (!d->mOptions.memoryWrite)
+ {
+ fclose(file);
+ ::remove(outFilename.c_str());
+ }
+ attempts++;
+ continue;
+ }
+
+ curl_easy_cleanup(d->mCurl);
+
+ if (!d->mOptions.memoryWrite)
+ {
+ // Don't check resources2.txt checksum
+ if (d->mOptions.checkAdler)
+ {
+ unsigned long adler = fadler32(file);
+
+ if (d->mAdler != adler)
+ {
+ fclose(file);
+
+ // Remove the corrupted file
+ ::remove(d->mFileName.c_str());
+ logger->log("Checksum for file %s failed: (%lx/%lx)",
+ d->mFileName.c_str(),
+ adler, d->mAdler);
+ attempts++;
+ continue; // Bail out here to avoid the renaming
+ }
+ }
+ fclose(file);
+
+ // Any existing file with this name is deleted first, otherwise
+ // the rename will fail on Windows.
+ ::remove(d->mFileName.c_str());
+ ::rename(outFilename.c_str(), d->mFileName.c_str());
+
+ // Check if we can open it and no errors were encountered
+ // during renaming
+ file = fopen(d->mFileName.c_str(), "rb");
+ if (file)
+ {
+ fclose(file);
+ complete = true;
+ }
+ }
+ else
+ {
+ // It's stored in memory, we're done
+ complete = true;
+ }
+ }
+ attempts++;
+ }
+
+ if (!complete) {
+ d->mUpdateFunction(d->mPtr, DOWNLOAD_STATUS_ERROR, 0, 0);
+ }
+ else
+ {
+ d->mUpdateFunction(d->mPtr, DOWNLOAD_STATUS_COMPLETE, 0, 0);
+ }
+
+ return 0;
+}
+
+
+} // namespace Net
diff --git a/src/net/download.h b/src/net/download.h
new file mode 100644
index 00000000..1e1f806f
--- /dev/null
+++ b/src/net/download.h
@@ -0,0 +1,108 @@
+/*
+ * The Mana World
+ * Copyright (C) 2009 The Mana World Development Team
+ *
+ * This file is part of The Mana World.
+ *
+ * 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
+ * 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
+ */
+
+#include <SDL_types.h>
+#include <stdio.h>
+#include <string>
+
+#ifndef NET_DOWNLOAD_H
+#define NET_DOWNLOAD_H
+
+enum DownloadStatus
+{
+ DOWNLOAD_STATUS_CANCELLED = -3,
+ DOWNLOAD_STATUS_THREAD_ERROR = -2,
+ DOWNLOAD_STATUS_ERROR = -1,
+ DOWNLOAD_STATUS_STARTING = 0,
+ DOWNLOAD_STATUS_IDLE,
+ DOWNLOAD_STATUS_COMPLETE
+};
+
+typedef int (*DownloadUpdate)(void *ptr, DownloadStatus status,
+ size_t total, size_t remaining);
+
+// Matches what CURL expects
+typedef size_t (*WriteFunction)( void *ptr, size_t size, size_t nmemb,
+ void *stream);
+
+struct SDL_Thread;
+typedef void CURL;
+struct curl_slist;
+
+namespace Net {
+class Download
+{
+ public:
+ Download(void *ptr, const std::string &url, DownloadUpdate updateFunction);
+
+ ~Download();
+
+ void addHeader(const std::string &header);
+
+ /**
+ * Convience method for adding no-cache headers.
+ */
+ void noCache();
+
+ void setFile(const std::string &filename, Sint64 adler32 = -1);
+
+ void setWriteFunction(WriteFunction write);
+
+ /**
+ * Starts the download thread.
+ * @returns true if thread was created
+ * false if the thread could not be made or download wasn't
+ * properly setup
+ */
+ bool start();
+
+ /**
+ * Cancels the download. Returns immediately, the cancelled status will
+ * be noted in the next avialable update call.
+ */
+ void cancel();
+
+ char *getError();
+
+ private:
+ static int downloadThread(void *ptr);
+ static int downloadProgress(void *clientp, double dltotal, double dlnow,
+ double ultotal, double ulnow);
+ void *mPtr;
+ std::string mUrl;
+ struct {
+ unsigned cancel : 1;
+ unsigned memoryWrite: 1;
+ unsigned checkAdler: 1;
+ } mOptions;
+ std::string mFileName;
+ WriteFunction mWriteFunction;
+ unsigned long mAdler;
+ DownloadUpdate mUpdateFunction;
+ SDL_Thread *mThread;
+ CURL *mCurl;
+ curl_slist *mHeaders;
+ char *mError;
+};
+
+} // namespace Net
+
+#endif // NET_DOWNLOAD_H
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