如何将ZIP文件从API管理上传到Blob存储 [英] How to upload ZIP File from API Management to Blob Storage

问题描述

1. 我正在通过其中一个Azure Api Mangement API发送POST请求

2. 在此发布请求中，有一个json正文，其中包含base64编码的数据(zip文件)，如以下示例所示:

1. I am sending a POST Request on one of my Azure Api Mangement APIs

2. In this post request there is a json body which contains base64 encoded data (zip file) like in this example:

{"foo":"bar"，"data":您的base64字符串"}

{ "foo": "bar", "data": "your-base64-string" }

在API策略中，我想向Azure存储REST API发送一个单独的请求，以将上述base64字符串另存为zip文件.

In the API Policy, I want to send a separate request to the Azure Storage REST API to save the above mentioned base64 string as a zip file.

现在的问题是:我可以成功地向Azure存储REST API发送请求，并通过以下语句下载生成的zip文件:

Now the problem: I can successfully send a request to the Azure Storage REST API and download the resulting zip file via this statement:

<set-body>@{
var base64String = (string)context.Variables.GetValueOrDefault<JObject>("body")["data"]) ;
var bytes = Convert.FromBase64String(base64String); 
var ascii = Encoding.ASCII.GetString(bytes); 
return ascii; 
}</set-body> 

问题是，我可以下载并打开zip文件，但是由于存档损坏，我无法提取其中的内容.

The thing is, I can download and open the zip file but I cannot extract the content of it as the archive got damaged.

这是一个示例base64编码的zip文件字符串(包含text.txt的ZIP文件):

Here is an example base64 encoded zip file string (ZIP File containing a text.txt):

<代码> UEsDBBQAAAAIAL1ZxE7MTbG/EwAAABMAAAAIAAAAdGVzdC50eHQLycgsVgCiRIWS1OKStMycVD0AUEsBAh8AFAAAAAgAvVnETsxNsb8TAAAAEwAAAAgAJAAAAAAAAAAgAAAAAAAAAHRlc3QudHh0CgAgAAAAAAABABgAI8Ac2LUa1QEjwBzYtRrVAZFuI861GtUBUEsFBgAAAAABAAEAWgAAADkAAAAAAA ==

这是我将其发布到Rest API的代码:

Here is my code for posting it to the Rest API:

<send-request mode="new" response-variable-name="putStorageRequest" timeout="5" ignore-error="true">
            <set-url>@((string)context.Variables["blobUrl"])</set-url>
            <set-method>PUT</set-method>
            <set-header name="x-ms-date" exists-action="override">
                <value>@((string) context.Variables["date"] )</value>
            </set-header>
            <set-header name="x-ms-version" exists-action="override">
                <value>@((string) context.Variables["version"] )</value>
            </set-header>
            <set-header name="x-ms-blob-type" exists-action="override">
                <value>BlockBlob</value>
            </set-header>
            <set-header name="Content-Type" exists-action="override">
                <value>application/zip</value>
            </set-header>
            <set-header name="Authorization" exists-action="override">
                <value>@{
                        string body = context.Request.Body.As<string>(preserveContent: true);
                        string contentType = "application/zip";
                        var base64String = (string)context.Variables.GetValueOrDefault<JObject>("body")["data"]) ;
            var bytes = Convert.FromBase64String(base64String); 
            var ascii = Encoding.ASCII.GetString(bytes)
                        var contentLength = ascii.Length;
                        var hmacSha256 = new System.Security.Cryptography.HMACSHA256 { Key = Convert.FromBase64String(context.Variables.GetValueOrDefault<string>("storageKey")) };
                        var payLoad = string.Format("{0}\n\n\n{1}\n\n{2}\n\n\n\n\n\n\nx-ms-blob-type:BlockBlob\nx-ms-date:{3}\nx-ms-version:{4}\n{5}", 
                            "PUT", 
                            contentLength,
                            contentType,
                            context.Variables["date"],
                            context.Variables["version"],
                            "/" + context.Variables.GetValueOrDefault<string>("storageAccountName") + context.Variables.GetValueOrDefault<string>("resource"));
                        return "SharedKey "+ context.Variables.GetValueOrDefault<string>("storageAccountName") + ":" + Convert.ToBase64String(hmacSha256.ComputeHash(Encoding.UTF8.GetBytes(payLoad)));
                    }</value>
            </set-header>
            <set-body>@{
                var base64String = (string)context.Variables.GetValueOrDefault<JObject>("body")["data"]) ;
                var bytes = Convert.FromBase64String(base64String); 
                var ascii = Encoding.ASCII.GetString(bytes); 
                return ascii;         
            }</set-body>
        </send-request>

推荐答案

Azure API Management现在在正文中支持byte []:

Azure API Management now supports byte[] in body:

https://azure.microsoft.com/en-us/updates/azure-api-management-update-september-2019

set-body策略还接受字节数组作为正文内容.

The set-body policy also accepts byte array as body content.

通过在Blob-Storage中创建一个zip文件，下载，打开该zip文件并打开包含的文本文件，我的测试成功了.

My test was successful by creating a zip-file in Blob-Storage, downloaded it, opened the zip-file and opened the containing Text-file.

使用了以下代码:

            <set-header name="Authorization" exists-action="override">
            <value>@{
                    string body = context.Request.Body.As<string>(preserveContent: true);
                    string contentType = "application/zip";
                    var base64String = (string)context.Variables.GetValueOrDefault<JObject>("body")["data"] ;
                    var bytes = Convert.FromBase64String(base64String); 
                    var contentLength = bytes.Length;
                    var hmacSha256 = new System.Security.Cryptography.HMACSHA256 { Key = Convert.FromBase64String(context.Variables.GetValueOrDefault<string>("storageKey")) };
                    var payLoad = string.Format("{0}\n\n\n{1}\n\n{2}\n\n\n\n\n\n\nx-ms-blob-type:BlockBlob\nx-ms-date:{3}\nx-ms-version:{4}\n{5}", 
                        "PUT", 
                        contentLength,
                        contentType,
                        context.Variables["date"],
                        context.Variables["version"],
                        "/" + context.Variables.GetValueOrDefault<string>("storageAccountName") + context.Variables.GetValueOrDefault<string>("resource"));
                    return "SharedKey "+ context.Variables.GetValueOrDefault<string>("storageAccountName") + ":" + Convert.ToBase64String(hmacSha256.ComputeHash(Encoding.UTF8.GetBytes(payLoad)));
                }</value>
        </set-header>
        <set-body>@{
            var base64String = (string)context.Variables.GetValueOrDefault<JObject>("body")["data"] ;
            var bytes = Convert.FromBase64String(base64String); 
            return bytes;         
        }</set-body>

我只需要删除:

var ascii = Encoding.ASCII.GetString(bytes); 

这篇关于如何将ZIP文件从API管理上传到Blob存储的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！