[英]C# API Call doesn't work with HttpWebRequest but do work with Postman
我试图用.Net Core 2.0应用程序模仿这个操作,代码如下:
static void Main(string[] args)
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://epaper.20minuten.ch/index.cfm/epaper/1.0/getEditionDoc");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
var serializer = new Newtonsoft.Json.JsonSerializer();
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
using (var tw = new Newtonsoft.Json.JsonTextWriter(streamWriter))
{
serializer.Serialize(tw,
new
{
editions = new[]
{
new
{
defId = "648",
publicationDate = "2018-03-06"
}
},
isAttachment = true,
fileName = "Gesamtausgabe_Lausanne_2018-03-06.pdf"
});
}
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
var responseText = streamReader.ReadToEnd();
Console.ReadLine();
}
}
但是我收到了500个错误。 我错过了什么?
我想这个问题可能是因为您正在调用外部URL,可能会出现阻止这些爬行请求的情况。 尝试为请求设置useragent以模仿浏览器调用。
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