从WebAPi调用REST服务和传输HttpResponseMessage
从WebAPi调用REST服务和传输HttpResponseMessage
提问于 2017-06-01 12:25:37
我必须从Web调用REST服务。调用和检索数据运行良好，但返回方法崩溃。我尝试过几种返回async HttpResponseMessage的方法，但是我也可以返回这个对象( chrome ERR_SPDY_PROTOCOL_ERROR上的错误套接字)。我也试过用一个普通的json作为字符串，但不再成功。
在这里，一些尝试：
[Route("{id}")]
public async Task<JObject> Get(string id)
{
dynamic client = new RestClient($"https://...../accounts/{id}/summary",
new Dictionary<string, string> {
//some KVP for access Rest API
});
//await client.Get() returns HttpResponseMessage 200 and Content is well populated
JObject result = JObject.FromObject(await client.Get());
return result;
//Request.CreateResponse(HttpStatusCode.OK, await result.Content.ReadAsAsync<string>());
//HttpResponseMessage result = await client.Get(); => HttpResponseMessage is well filled
//Request.CreateResponse(HttpStatusCode.OK, await result.Content.ReadAsAsync<string>()); => test with wrapping inside a new HttpResponseMessage but no more success
//using (var client = new HttpClient())
//{
// client.BaseAddress = new Uri($"https://....../v1/accounts/{id}/summary");
// client.DefaultRequestHeaders.Accept.Clear();
// client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
// HttpResponseMessage response = await client.GetAsync("");
// return Request.CreateResponse(HttpStatusCode.OK, response.Content.ReadAsAsync());
//}
}是否有一种简单的方法从Rest服务中检索json并按原样进行传输？
回答 2
Stack Overflow用户
回答已采纳
发布于 2017-06-02 08:11:25
如果这些调用是在Web中执行的，并且没有将逻辑应用于JSON对象，那么在返回JSON对象之前不需要解析它，因为当返回时它将再次序列化，您可以在前端应用程序上解析它并在那里执行您的逻辑。
HttpClient有一个将响应体作为字符串返回的方法，这是GetStringAsync。当主体作为字符串返回时，您可以在HttpResponseMessage中直接返回
下面是一个使用HttpClient注释代码的示例。
[Route("{id}")]
public async Task<HttpResponseMessage> Get(string id)
{
using (var client = new HttpClient())
{
client.BaseAddress = new Uri($"https://....../v1/accounts/");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
// Fetch the response body as a string
// Resource URI added below
string responseContent = await client.GetStringAsync($"{id}/summary");
// Create our response object and set the content to its StringContent
var response =
new HttpResponseMessage(HttpStatusCode.OK) {Content = new StringContent(responseContent)};
// Return our HttpResponseMessage containing our json text
return response;
}
}Stack Overflow用户
发布于 2017-06-02 07:42:53
如果您只想从另一个API传输json响应，可以使用Web中的代码，如下所示：
[HttpGet]
[Route("v1/test", Name = "test")]
public HttpResponseMessage GetTest()
{
UriBuilder uriBuilder = new UriBuilder($"https://...../...");
var webRequest = (HttpWebRequest)WebRequest.Create(uriBuilder.Uri);
webRequest.Method = "GET";
webRequest.ContentType = "application/json; charset=utf-8";
webRequest.Accept = "application/json, text/javascript, */*";
using (var jsonResponse = (HttpWebResponse) webRequest.GetResponse())
{
var jsonStream = jsonResponse.GetResponseStream();
MemoryStream ms = new MemoryStream();
jsonStream.CopyTo(ms);
ms.Position = 0;
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
response.Content = new StreamContent(ms);
response.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
return response;
}
}当只需要支持身份验证或授权特性时，我更愿意使用API管理器，而不是自己维护这类代码。
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原文链接：
https://stackoverflow.com/questions/44307498
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