Method Seek

framework/data_source/curl/curl_data_source2.cpp:307–396

}

int64_t CurlDataSource2::Seek(int64_t offset, int whence)
{
    //    CURL_LOGD("CurlDataSource2::Seek position is %lld,when is %d", offset, whence);
    if (!mPConnection) {
        return -(ESPIPE);
    }
    if (whence == SEEK_SIZE) {
        return mFileSize;
    } else if (((whence == SEEK_CUR && offset == 0) || (whence == SEEK_SET && offset == mPConnection->tell())) &&
               !mPConnection->needReconnect()) {
        return mPConnection->tell();
    } else if ((mFileSize <= 0 && whence == SEEK_END) /*|| h->is_streamed*/) {
        return FRAMEWORK_ERR(ENOSYS);
    }

    if (whence == SEEK_CUR) {
        offset += mPConnection->tell();
    } else if (whence == SEEK_END) {
        offset += mFileSize;
    } else if (whence != SEEK_SET) {
        return FRAMEWORK_ERR(EINVAL);
    }

    if (offset < 0) {
        return -(ESPIPE);
    }

    if (offset == mPConnection->tell() && !mPConnection->needReconnect()) {
        return offset;
    }

    /* do not try to make a new connection if seeking past the end of the file */
    if (rangeEnd != INT64_MIN || mFileSize > 0) {
        uint64_t end_pos = rangeEnd != INT64_MIN ? rangeEnd : mFileSize;
        if (offset >= end_pos) {
            mPConnection->SetResume(offset);
            return offset;
        }
    }

    if (offset == mFileSize) {
    }

    //first seek in cache
    if (!mNeedReconnect) {
        if (mPConnection->short_seek(offset) >= 0) {
            AF_LOGI("short seek ok\n");
            return offset;
        } else {
            AF_LOGI("short seek failed\n");
        }
    } else {
        closeConnections(true, true);
    }
#if USE_MULTI
    CURLConnection2 *con = nullptr;
    for (auto item = mConnections->begin(); item != mConnections->end();) {
        if ((*(item))->short_seek(offset) >= 0) {