Invoke-WebRequest 返回某些地址的意外结果

Question

我在尝试处理时似乎遇到了某些地址的问题 Invoke-WebRequest

下面的地址是我遇到的几个例子之一。

[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

(Invoke-WebRequest https://s3.amazonaws.com/lists.disconnect.me/simple_ad.txt).Content
(Invoke-WebRequest https://s3.amazonaws.com/lists.disconnect.me/simple_ad.txt).RawContent

Content 属性似乎只返回一个数字数组。RawContent 显示的结果更接近我的预期。

这是什么原因？

内容

35
32
65
100
32
102
105
108
116
101

原始内容

HTTP/1.1 200 OK
x-amz-id-2: juI0bRXZacf19D5/sjmsw53XudBjlbSYtO0XKVQP0N+dWXvixKoWs8mV8oF23SLt8iGjaE/CKco=
x-amz-request-id: 5B68B280AD366CDE
Accept-Ranges: bytes
Content-Length: 43642
Content-Type: 
Date: Fri, 13 Jul 2018 23:25:09 GMT
ETag: "0a43bd5ebd9b3e2ee08a205d163cb0ac"
Last-Modified: Wed, 09 Mar 2016 19:46:05 GMT
Server: AmazonS3

# Ad filter list by Disconnect
# License: GPLv3
# Contact: support [at] disconnect.me

htmlcontent

Answer 1

如果您查看标题，则内容类型为空，因此Invoke-WebRequest不知道它在处理什么并将数据视为二进制数据（字节数组）。

(Invoke-WebRequest https://s3.amazonaws.com/lists.disconnect.me/simple_ad.txt).Headers

Key              Value
---              -----
Accept-Ranges    bytes
Content-Length   43642
Content-Type
Date             Sat, 14 Jul 2018 02:28:36 GMT
ETag             "0a43bd5ebd9b3e2ee08a205d163cb0ac"
Last-Modified    Wed, 09 Mar 2016 19:46:05 GMT
Server           AmazonS3

虽然例如调用Invoke-WebRequest这个问题：

(Invoke-WebRequest /sf/ask/3593377581/
d-results-for-some-addresses).Headers

Key                       Value
---                       -----
X-Frame-Options           SAMEORIGIN
X-Request-Guid            9366c316-b9b3-467b-8911-b18bb4752e1c
Strict-Transport-Security max-age=15552000
Content-Security-Policy   upgrade-insecure-requests
Age                       0,0
Accept-Ranges             bytes,bytes
Content-Length            108783
Cache-Control             private
Content-Type              text/html; charset=utf-8
…

编辑：如果你想否决内容类型，你可以这样做：

$url  = 'https://s3.amazonaws.com/lists.disconnect.me/simple_ad.txt'
[System.Net.HttpWebRequest]$req = [System.Net.WebRequest]::Create($url) -as [System.Net.HttpWebRequest]
[System.Net.HttpWebResponse]$resp = $req.getResponse()
$respStream = $resp.getResponseStream()
$sr = new-object IO.StreamReader($respStream)
$result = $sr.ReadToEnd()
$resp.Close()