Question

我正在实施对JWPlayer Management API的Web客户端调用。我已经使用非加速上传方法成功创建了Web客户端调用。我现在正尝试使用WebClient实现一个PUT调用，以实现S3加速上传方法。

/*The documentation states:
Two-step process
S3 file upload is done using a two-step process:
First, /videos/create or /videos/update API call is done. The call     will return an upload URL. 
*/

其次，使用HTTP PUT方法将文件提交到此上传URL。

/*Upload URL
Response of the create or update API call includes a link block   with parameters that should be used to construct the upload URL. For example, response of the /videos/create API call:
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <video key="tL17msiU">
    <link>
      <protocol>https</protocol>
      <address>upload-s3.jwplatform.com</address>
      <path>/tL17msiU</path>
      <query>
        <AWSAccessKeyId>AKIAIRXCJ3TPZA4HVNYZ</AWSAccessKeyId>
        <Expires>1482770374</Expires>
        <Signature>1/l+L6/yOE05dNEbXHW8sw7TGF4=</Signature>
      </query>
    </link>
  </video>
</response>
*/

应使用以下方案从链接块的各个部分连接上传URL：

upload_url = <link/protocol> + "://" + <link/address> + <link/path> +
"?AWSAccessKeyId=" + <link/query/AWSAccessKeyId> +
"&Expires=" + <link/query/Expires> +
"&Signature=" + urlencode(<link/query/Signature>)

这应该使用上面的响应示例生成以下上传URL：

https://upload-s3.jwplatform.com/tL17msiU
?AWSAccessKeyId=AKIAIRXCJ3TPZA4HVNYZ
&Expires=1482770374
&Signature=1%2Fl%2BL6%2FyOE05dNEbXHW8sw7TGF4%3D

上传文件

构建上传网址后，可以使用它来上传文件，例如curl工具：

/*
curl --request PUT --upload-file /file_path/file_name.mp4 \
"https://upload-s3.jwplatform.com  /tL17msiU?AWSAccessKeyId=AKIAIRXCJ3TPZA4HVNYZ&Expires=1482770374&  Signature=1%2Fl%2BL6%2FyOE05dNEbXHW8sw7TGF4%3D"***
*/

我已经成功生成了上传网址，但是我在使用.NET webClient调用替换通常在PHP中完成的curl调用时遇到了问题。我已经尝试了webClient.UploadString和WebClient.UpdateData，但我一直收到无效请求格式404错误。我的代码是：

//Ignore this line, this simply uses a 3rd party tool to generate the upload URL
BotRAPI api = new BotR.API.BotRAPI("xxx", "yyy");

//params to store with a new video
NameValueCollection col = new NameValueCollection() {                    
{"up load_method", "s3"}
};

//create the new video
string xml = api.Call("/videos/create", col);

XDocument doc = XDocument.Parse(xml);
var result = (from d in doc.Descendants("status")
select new
{
   Status = d.Value
).FirstOrDefault();

//make sure the status was "ok" before trying to upload
if (result.Status.Equals("ok",    StringComparison.CurrentCultureIgnore Case))
{

    var response = doc.Descendants("link").FirstOrDefault();
    String url = string.Format("{0}://{1}{2}",      response.Element("protocol").Value, response.Element("address").Value,    response.Element("path").Value);

response = doc.Descendants("query").FirstOrDefault();
url = string.Format(url + "?AWSAccessKeyId={0}&Expires={1}&   Signature={2}", response.Element("AWSAccessKeyId").Value,     response.Element("Expires").Value, response.Element("Signature").Value);

}

然后我尝试使用WebClient启动PUT调用：

string filePath = Path.Combine(Environment.CurrentDirectory, "test.mp4");

byte[] data = ReadAllBytes(FilePath);

MyWebClient client = WebClient();
client.UploadData(url,data);

使用针对JWPlayer的PUT方法实现Web客户端调用

0 个答案: