如何处理 HTTP 操作上的 GZip/Deflate

Question

我默认有an HTTP Action in Azure Logic Apps that calls a StackExchange API, fundamentally, it could be any API that returned GZip or Deflate个内容：

因为响应既不是 Plain Text nor JSON HTTP 操作的输出也是：

{
  "$content-encoding": "gzip",
  "$content-type": "application/json; charset=utf-8",
  "$content": "H4sIAAAAAAAEAGWPzY7CMAyE38XnqsrPFtq+ClpFoXghEkm6iVtWQrw7Lt3mAEd/Hs+M7+AIfYb+cIeAN2MHcjOaKWNiKCqgSPa6zZ2SFRzt6YzZjJiMd2EiZF0tvjbpuoZe7rrdxuZIC9KNLo5D9B4DLUIl2gpsyDfOeLflvN8JM7kYPnbF6/+WA/ZNYcOAI+Hp5V/eCKv0heVGSwD0SnRcZXQm4ewyM+hBCbmvda3aWjVaS3h8V3Cx2fiYuMePvWZcSrKV8faPSyzF1jmhty64cGbnVjyeRIHcnG0BAAA="
}

如果你不厌其烦地通过 @base64toString() 传递 $content 字段，你最终会得到 JSON 的 Gzip 二进制表示，就我而言可以拿。

问题：我怎样才能强制 HTTP 操作像 HttpClient 一样运行并接受 GZip 数据并从操作中发出 JSON，或者更费力地获取 GZip Base64/Binary 数据并在进一步操作之前解压缩它？

Answer 1

我无法找到直接解决 "solve" 问题的方法，所以我创建了一个 Azure Function that made the request to the URL with the appropriate HttpClientHandler passed into the HttpClient:

#r "Newtonsoft.Json"

using System;
using System.Net;
using Newtonsoft.Json;

public static async Task<object> Run(HttpRequestMessage req, TraceWriter log) {
  string jsonContent = await req.Content.ReadAsStringAsync();
  dynamic data = JsonConvert.DeserializeObject(jsonContent);

  if (data.url == null) {
    return req.CreateResponse(HttpStatusCode.BadRequest, new {
      error = "Please pass a URL in the input object"
    });
  }

  HttpClientHandler handler = new HttpClientHandler() {
    AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate
  };

  var client = new HttpClient(handler);
  var result = await client.GetAsync((string)data.url);
  var response = req.CreateResponse(HttpStatusCode.OK);
  response.Content = result.Content;
  return response;
}

通过交换原始问题中的内置 HTTP 操作，我能够使它正常工作：

Azure函数的配置如下：

如何处理 HTTP 操作上的 GZip/Deflate

How to handle GZip/Deflate on HTTP Actions

azure-logic-apps