Question

我想从网站下载图片，但该网站需要提供用户会话cookie，因此可以打开带有图片的网址。我尝试使用WebClient()并发送Cookie，但网址仍未打开。

编辑：如果我client.DownloadData(url)，它会将图片下载到字节中，因此可以正确访问它。但是，如果我使用Picasso下载图片，则无效。应用程序输出是这样的：

    [Mono] Assembly Ref addref App[0xb4710760] -> Picasso[0xb4710ca0]: 2
[Settings] Setting airplane_mode_on has moved from android.provider.Settings.System to android.provider.Settings.Global, returning read-only value.
[System.err] remove failed: ENOENT (No such file or directory) : /data/data/***********/cache/picasso-cache/journal.tmp
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isShipBuild true
[System.out] (HTTPLog)-Thread-5078-732856181: SmartBonding Enabling is false, SHIP_BUILD is true, log to file is false, DBG is false
[System.out] (HTTPLog)-Thread-5078-732856181: SMARTBONDING_FEATURE_ENABLED is true
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] KnoxVpnUidStorageknoxVpnSupported API value returned is false
[System.out] KnoxVpnUidStorageknoxVpnSupported API value returned is false
[System.out] KnoxVpnUidStorageknoxVpnSupported API value returned is false
[System.out] KnoxVpnUidStorageknoxVpnSupported API value returned is false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[System.out] (HTTPLog)-Static: isSBSettingEnabled false
[skia] --- SkImageDecoder::Factory returned null
[System.out] (HTTPLog)-Static: isSBSettingEnabled false

代码：

public void DownloadImage(string url, Context context, ImageView imageView) {
        ISharedPreferences pref = context.GetSharedPreferences("UserSession", FileCreationMode.Private);
        string cookie = pref.GetString("PHPSESSID", string.Empty);

        using (var client = new WebClient()) {
            client.Headers.Add(HttpRequestHeader.Cookie, "PHPSESSID=" + cookie);
            Picasso.With(context).Load(url).Into(imageView);
        }
    }

使用会话Cookie访问网络内容

0 个答案: