Question

我一直在使用一个非常简单的Web服务器脚本，我对其进行了修改以充当代理。但是，在创建发布请求（上传文件）时，似乎在更大的文件上失败。小文件（尝试使用一堆100kB文件）不是问题，但是大文件（6 mB）会失败，并且似乎会被截断。

如果我在Fiddler中检查了请求，我注意到身体的一部分正丢失。

似乎$request未完成，或者从$request到$data的转换（带有函数提取）失败了。

我怀疑在读完数据后，我在将其写回时也会遇到问题，但是我怀疑解决方案是相同的。

代码：

function get-route($pattern) {
    if ($pattern -like "*GET*") {
        $page = (Invoke-WebRequest -Uri ($baseURL+$request.Url.LocalPath) -UseBasicParsing -WebSession $webSession ).Content
        return $page
    }
    if ($pattern -like "*POST*") {
        $data = extract $request
        $page = (Invoke-WebRequest -Uri ($baseURL+$request.Url.LocalPath) -UseBasicParsing -Method Post -Body $data -ContentType $request.ContentType -WebSession $webSession -MaximumRedirection 10)
        $page = $page.Content
        return $page
    }
}

# get post data from the input stream.
function extract($request) {
    $length = $request.ContentLength64
    $buffer = New-Object "Byte[]" $length

    # option 1
    [void]$request.InputStream.Read($buffer, 0, $length)

#    # also tried this, but the result is the same
#    # option 2
#    $recvdBytes = 0
#    $currOffset = 0
#    $currLength = $length
#    $currRead = 0
#    while ($recvdBytes -lt $length) {
#        $currRead = $request.InputStream.Read($buffer, $currOffset, $currLength)
#        $recvdBytes += $currRead
#        $currOffset += $currRead
#        $currLength -= $curRead
#    }

    $body = [System.Text.Encoding]::GetEncoding("iso-8859-1").GetString($buffer)
    return $body
}

$listener = New-Object System.Net.HttpListener
$listener.Prefixes.Add($url)
$listener.Start()

while ($listener.IsListening) {
    $context = $listener.GetContext()
    $request = $context.Request
    $response = $context.Response

    $pattern = "{0} {1}" -f $request.HttpMethod, $request.Url.LocalPath
    $route = get-route $pattern
    $request.Url.OriginalString
    #$route

    if ($route -eq $null) {
        $response.StatusCode = 404
    } else {
        $content = $route
        $buffer = [System.Text.Encoding]::UTF8.GetBytes($content)
        $response.ContentLength64 = $buffer.Length
        $response.OutputStream.Write($buffer, 0, $buffer.Length)
    }

    $response.close()
}

PowerShell httplistener：请求被截断

0 个答案: