问dev_appserver.py在本地拒绝修补程序请求，但在部署时接受它
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Stack Overflow用户

提问于 2014-02-19 11:58:52

回答 1查看 121关注 0票数 2

我有一个基于djangoappengine，Backbone.js和Django REST Framework的应用程序，它通过model.save调用的{patch: true}使用补丁请求来更新模型。

我发现在本地测试时，dev_appserver会返回：

ERROR 2014-02-19 04:37:04,531 dev_appserver.py:3081] code 501, message Unsupported method ('PATCH')

INFO 2014-02-19 04:37:04,532 dev_appserver.py:3090] "PATCH /api/posts/5707702298738688 HTTP/1.1" 501 -

然而，当我部署它并通过appspot访问它时，服务器很高兴地接受了请求。这迫使我每次进行更改并想要测试它时都要进行部署。

我正在运行Python SDK的最新版本(1.89)，发现和old fixed issue似乎可以解决这个问题，但它似乎是other people have had it。

我尝试过this patch，但没有什么不同。我不明白为什么开发服务器会拒绝它们，而不是生产服务器，有什么我需要改变的吗？

谢谢。

google-app-engine

backbone.js

django-rest-framework

djangoappengine

回答 1

Stack Overflow用户

发布于 2015-12-08 04:39:36

要更新资源，可以使用带有x-http-method-override的POST来打补丁。这是一个有效的RESTful操作，使用POST将与防火墙和较旧的用户代理更兼容。请求中的数据应指示要更新的内容。

var url = '/api/posts/5707702298738688'
var patch_ops =  [
        { "op": "replace", "path": "/properties/", "author": text}
        { "op": "add", "path": "/replies/", {"author": text, "comment":"blah"}}
        /*
            { "op": "remove", "path": "/a/b/c" },
            { "op": "add", "path": "/a/b/c", "value": [ "foo", "bar" ] },
            { "op": "replace", "path": "/a/b/c", "value": 42 },
            { "op": "move", "from": "/a/b/c", "path": "/a/b/d" },
            { "op": "copy", "from": "/a/b/d", "path": "/a/b/e" } 
       */
    ];

 var xhr = jQuery.ajax({
        type: "POST",
        beforeSend: function (request)
        {
            request.setRequestHeader("X-HTTP-Method-Override", "PATCH");
        },
        url: url,
        data: my_json_string,
        dataType:"json",
        success: function(data) {
            return data;
        },
        error: function(xhr, textStatus, error){
              return error;
        }
    });

服务器处理程序：

def post(self, object_name):
    if self.request.headers['x-http-method-override'] == 'PATCH':
        # update according to patch operations
        patch_ops_str= self.request.body.decode('utf-8')    
        try:
            patch_ops = json.loads(new_area_geojson_str)
        except:
            self.response.set_status(400)
            return self.response.out.write('{"status": "error", "reason": "JSON Parse error" }')

     else:
         self.response.set_status(405)
         return self.response.out.write('{"status": "error", "reason": "post not accepted without x-http-method-override to PATCH" }')