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      1 /*
      2  * Copyright (C) 2012 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 //#define LOG_NDEBUG 0
     18 #define LOG_TAG "SDPLoader"
     19 #include <utils/Log.h>
     20 
     21 #include "SDPLoader.h"
     22 
     23 #include "ASessionDescription.h"
     24 #include "HTTPBase.h"
     25 
     26 #include <media/stagefright/foundation/ABuffer.h>
     27 #include <media/stagefright/foundation/ADebug.h>
     28 
     29 #define DEFAULT_SDP_SIZE 100000
     30 
     31 namespace android {
     32 
     33 SDPLoader::SDPLoader(const sp<AMessage> &notify, uint32_t flags, bool uidValid, uid_t uid)
     34     : mNotify(notify),
     35       mFlags(flags),
     36       mUIDValid(uidValid),
     37       mUID(uid),
     38       mNetLooper(new ALooper),
     39       mCancelled(false),
     40       mHTTPDataSource(
     41               HTTPBase::Create(
     42                   (mFlags & kFlagIncognito)
     43                     ? HTTPBase::kFlagIncognito
     44                     : 0)) {
     45     if (mUIDValid) {
     46         mHTTPDataSource->setUID(mUID);
     47     }
     48 
     49     mNetLooper->setName("sdp net");
     50     mNetLooper->start(false /* runOnCallingThread */,
     51                       false /* canCallJava */,
     52                       PRIORITY_HIGHEST);
     53 }
     54 
     55 void SDPLoader::load(const char *url, const KeyedVector<String8, String8> *headers) {
     56     mNetLooper->registerHandler(this);
     57 
     58     sp<AMessage> msg = new AMessage(kWhatLoad, id());
     59     msg->setString("url", url);
     60 
     61     if (headers != NULL) {
     62         msg->setPointer(
     63                 "headers",
     64                 new KeyedVector<String8, String8>(*headers));
     65     }
     66 
     67     msg->post();
     68 }
     69 
     70 void SDPLoader::cancel() {
     71     mCancelled = true;
     72     sp<HTTPBase> HTTPDataSource = mHTTPDataSource;
     73     HTTPDataSource->disconnect();
     74 }
     75 
     76 void SDPLoader::onMessageReceived(const sp<AMessage> &msg) {
     77     switch (msg->what()) {
     78         case kWhatLoad:
     79             onLoad(msg);
     80             break;
     81 
     82         default:
     83             TRESPASS();
     84             break;
     85     }
     86 }
     87 
     88 void SDPLoader::onLoad(const sp<AMessage> &msg) {
     89     status_t err = OK;
     90     sp<ASessionDescription> desc = NULL;
     91     AString url;
     92     CHECK(msg->findString("url", &url));
     93 
     94     KeyedVector<String8, String8> *headers = NULL;
     95     msg->findPointer("headers", (void **)&headers);
     96 
     97     if (!(mFlags & kFlagIncognito)) {
     98         ALOGI("onLoad '%s'", url.c_str());
     99     } else {
    100         ALOGI("onLoad <URL suppressed>");
    101     }
    102 
    103     if (!mCancelled) {
    104         err = mHTTPDataSource->connect(url.c_str(), headers);
    105 
    106         if (err != OK) {
    107             ALOGE("connect() returned %d", err);
    108         }
    109     }
    110 
    111     if (headers != NULL) {
    112         delete headers;
    113         headers = NULL;
    114     }
    115 
    116     off64_t sdpSize;
    117     if (err == OK && !mCancelled) {
    118         err = mHTTPDataSource->getSize(&sdpSize);
    119 
    120         if (err != OK) {
    121             //We did not get the size of the sdp file, default to a large value
    122             sdpSize = DEFAULT_SDP_SIZE;
    123             err = OK;
    124         }
    125     }
    126 
    127     sp<ABuffer> buffer = new ABuffer(sdpSize);
    128 
    129     if (err == OK && !mCancelled) {
    130         ssize_t readSize = mHTTPDataSource->readAt(0, buffer->data(), sdpSize);
    131 
    132         if (readSize < 0) {
    133             ALOGE("Failed to read SDP, error code = %ld", readSize);
    134             err = UNKNOWN_ERROR;
    135         } else {
    136             desc = new ASessionDescription;
    137 
    138             if (desc == NULL || !desc->setTo(buffer->data(), (size_t)readSize)) {
    139                 err = UNKNOWN_ERROR;
    140                 ALOGE("Failed to parse SDP");
    141             }
    142         }
    143     }
    144 
    145     mHTTPDataSource.clear();
    146 
    147     sp<AMessage> notify = mNotify->dup();
    148     notify->setInt32("what", kWhatSDPLoaded);
    149     notify->setInt32("result", err);
    150     notify->setObject("description", desc);
    151     notify->post();
    152 }
    153 
    154 }  // namespace android
    155