C# 在Asp.Net内核中使用POST方法重定向到URL
我有一个简单的url重写器:C# 在Asp.Net内核中使用POST方法重定向到URL,c#,url,redirect,url-rewriting,asp.net-core,C#,Url,Redirect,Url Rewriting,Asp.net Core,我有一个简单的url重写器: private static void RedirectToAPI(RewriteContext context) { var request = context.HttpContext.Request; if (request.Path.Value.StartsWith("/apiendpoint", StringComparison.OrdinalIgnoreCase)) {
private static void RedirectToAPI(RewriteContext context)
{
var request = context.HttpContext.Request;
if (request.Path.Value.StartsWith("/apiendpoint", StringComparison.OrdinalIgnoreCase))
{
var json = JsonConvert.SerializeObject(request.Path.Value
.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries)
.Skip(1));
var response = context.HttpContext.Response;
response.Headers[HeaderNames.Location] = $"/custom";
response.StatusCode = StatusCodes.Status301MovedPermanently;
context.Result = RuleResult.EndResponse;
using (var bodyWriter = new StreamWriter(response.Body))
{
bodyWriter.Write(json);
bodyWriter.Flush();
}
}
}
问题是,当它重定向到/customurl时,request有方法GET,而这个方法需要POST
例如,将GET请求发送到url/apiendpoint/first/second/third,然后重写器响应重定向,因此,下面的请求必须使用方法POST,但现在是GET
如何更改url重写器响应后的请求方法?这是一个示例代码
public class ConvertGetToPostHandler : DelegatingHandler
{
protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
// Add your logic here to decide if the request Method needs to be changed
// Caution: This works only if you're redirecting internally
request.Method = HttpMethod.Post;
return await base.SendAsync(request, cancellationToken);
}
}
公共类ConvertGetToPostHandler:DelegatingHandler
{
受保护的覆盖异步任务SendAsync(HttpRequestMessage请求,CancellationToken CancellationToken)
{
//在此处添加逻辑以决定是否需要更改请求方法
//警告:这仅在内部重定向时有效
request.Method=HttpMethod.Post;
返回wait base.sendaync(请求、取消令牌);
}
}
您必须将处理程序添加到处理程序管道中,如下所示:
config.MessageHandlers.Add(新的ConvertGetToPostHandler())代码>
另外,仔细阅读这篇文章,了解它的用途和用法。编辑:啊,刚才查看了评论。如果最初的请求是GET,那么这也不起作用,您不能告诉浏览器发布。如果不返回一个使用JavaScript自动执行表单的视图,则不能这样做
您需要返回308,而不是301
以下是更改后的代码:
private static void RedirectToAPI(RewriteContext context)
{
var request = context.HttpContext.Request;
if (request.Path.Value.StartsWith("/apiendpoint", StringComparison.OrdinalIgnoreCase))
{
var json = JsonConvert.SerializeObject(request.Path.Value
.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries)
.Skip(1));
var response = context.HttpContext.Response;
response.Headers[HeaderNames.Location] = $"/custom";
response.StatusCode = 308;
context.Result = RuleResult.EndResponse;
using (var bodyWriter = new StreamWriter(response.Body))
{
bodyWriter.Write(json);
bodyWriter.Flush();
}
}
}
308是一个永久重定向,要求浏览器保留该方法
临时版本是307
MVC Core 2.0.0-preview1中提供了这些重定向的方便方法。您能否将@juunas answer设置为正确答案,他的答案为我解决了这个问题,正如您在示例代码中看到的那样
internal class RedirectCultureRule : IRule
{
private const string CultureKey = "culture";
public void ApplyRule(RewriteContext context)
{
HttpRequest httpRequest = context.HttpContext.Request;
httpRequest.Query.TryGetValue(CultureKey, out StringValues cultureValues);
string culture = cultureValues;
if (cultureValues.Count > 0 && culture.IsCultureMatch())
{
context.Result = RuleResult.ContinueRules;
return;
}
Dictionary<string, string> queryParts = new Dictionary<string, string>();
NameValueCollection queryString = HttpUtility.ParseQueryString(httpRequest.QueryString.ToString());
foreach (string key in queryString)
{
queryParts[key.Trim()] = queryString[key].Trim();
}
if (!queryParts.ContainsKey(CultureKey))
{
queryParts[CultureKey] = CultureInfo.CurrentCulture.Name;
}
string query = $"?{string.Join("&", queryParts.Select(qp => $"{qp.Key}={qp.Value}"))}";
if (query.Length > 1)
{
httpRequest.QueryString = new QueryString(query);
}
string url = UriHelper.GetDisplayUrl(httpRequest);
HttpResponse httpResponse = context.HttpContext.Response;
httpResponse.StatusCode = 308;
httpResponse.Headers[HeaderNames.Location] = url;
using (StreamReader requestReader = new StreamReader(httpRequest.Body))
{
using (StreamWriter responseWriter = new StreamWriter(httpResponse.Body))
{
string body = requestReader.ReadToEnd();
responseWriter.Write(body);
responseWriter.Flush();
}
}
context.Result = RuleResult.EndResponse;
}
}
内部类重定向culturerule:IRule
{
private const string CultureKey=“culture”;
public void ApplyRule(重写上下文)
{
HttpRequest HttpRequest=context.HttpContext.Request;
httpRequest.Query.TryGetValue(CultureKey,out-StringValues-cultureValues);
字符串区域性=cultureValues;
如果(cultureValues.Count>0&&culture.IsCultureMatch())
{
context.Result=RuleResult.ContinueRules;
返回;
}
Dictionary queryParts=new Dictionary();
NameValueCollection queryString=HttpUtility.ParseQueryString(httpRequest.queryString.ToString());
foreach(查询字符串中的字符串键)
{
queryParts[key.Trim()]=queryString[key].Trim();
}
如果(!queryParts.ContainsKey(CultureKey))
{
queryParts[CultureKey]=CultureInfo.CurrentCulture.Name;
}
字符串查询=$“?{string.Join(&),queryParts.Select(qp=>$”{qp.Key}={qp.Value}”))}”;
如果(query.Length>1)
{
httpRequest.QueryString=新的QueryString(查询);
}
字符串url=UriHelper.GetDisplayUrl(httpRequest);
HttpResponse HttpResponse=context.HttpContext.Response;
httpResponse.StatusCode=308;
httpResponse.Headers[HeaderNames.Location]=url;
使用(StreamReader requestReader=newstreamreader(httpRequest.Body))
{
使用(StreamWriter responseWriter=newstreamwriter(httpResponse.Body))
{
字符串体=requestReader.ReadToEnd();
写作(正文);
responseWriter.Flush();
}
}
context.Result=RuleResult.EndResponse;
}
}
如果使用ASP.NET Core 2.0有RedirectPermanentPreserve方法,您可以阅读它。如果此方法不受支持,您可以尝试手动执行。您是否尝试了request.method=“POST”
?@Gururaj是的,没有任何更改,仍然获取request.request.method=HttpMethod.POST@古鲁拉和以前的完全一样。然而,request.Method
在重写之前更改了传入请求的方法,而我需要在.Gosh!之后更改!,我怎么会错过这个-我的道歉。查看您的代码,我发现您没有在服务器上进行内部重定向,而是创建了一个响应,将请求重定向到另一个URI。您是否尝试使用DelegatingHandler
实现和重写SendAsync
方法来更改请求方法。除非您不尝试重定向到外部URI,否则这是有效的。ASP.NET核心中没有DelegatingHandler。是用来代替抱歉的伴侣的。看来今天不是我的好日子。对不起,浪费了你的时间。我还没有在Core上工作过:(检查此参考,如果有帮助您的方法很好,尽管如前所述,在Asp.Net Core中有中间件,这正是我寻找的目的。@YuriyN。感谢您确认我的方法。我之前共享了一个参考,其中描述了从处理程序迁移到核心中间件的过程。请阅读此参考,看看是否那对你有任何帮助。