更新:使用基于Eamonn Gahan的答案的解决方案更新代码
我正在尝试获取一些用户生成的文件,这些文件无法被信任以正确格式化。我认为这很简单,但是当我的回答有点像JSON时,我很难做什么,但事实并非如此。
例如,如果服务器响应:a simple string {with brackets}
一切都按预期工作。但是,如果服务器响应:{ not_json: { malformed on purpose }
,那么我无法弄清楚如何访问响应,无论是成功还是失败响应。
似乎发生的是Angular JSON解析器抛出语法错误而不拒绝$ http promise。
以下是一些突出问题的代码。
var myApp = angular.module('myApp', []);
function MyCtrl($scope, $http){
// --- Added this block based on Eamonn Gahan's answer
function txfmParseText(data, hdrGetter){
var contentType = hdrGetter()['content-type'];
if ( contentType.match(/^text\/plain/) ){
data = JSON.stringify(data);
}
return data ;
}
$http.defaults.transformResponse.unshift(txfmParseText);
// --- end of updated block
$scope.sanityCheck="Alive";
// URL returns (as text/plain):
// { not_json: { malformed on purpose }
var urlOpts1 = {
method: 'GET',
url: 'https://s3.amazonaws.com/forforf-cdn/not_json_test'
};
// URL returns (as text/plain):
// a simple string {with brackets}
var urlOpts2 = {
method: 'GET',
url: 'https://s3.amazonaws.com/forforf-cdn/simple_string_with_brackets'
};
// First request fails [update: passes with transformResponse function]
$http(urlOpts1)
.then(function(resp){
//never gets here
console.log(resp);
$scope.notJson = resp.data;
})
.catch(function(err){
//nor is the promise rejected
console.log(err)
});
// Second request works as expected
$http(urlOpts2).then(function(resp){
//works as expected
console.log(resp);
$scope.stringWithBrackets = resp.data;
});
}
这是失败的请求和响应的HTTP。数据由S3提供,数据的内容类型设置为text/plain
。
Request URL:https://s3.amazonaws.com/forforf-cdn/not_json_test
Request Method:GET
Status Code:304 Not Modified
Request Headers
GET /forforf-cdn/not_json_test HTTP/1.1
Host: s3.amazonaws.com
Connection: keep-alive
Cache-Control: max-age=0
Accept: application/json, text/plain, */*
Origin: http://fiddle.jshell.net
User-Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36
Referer: http://fiddle.jshell.net/_display/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
If-None-Match: "84cf04d01a85ed58af77293ea7b1884a"
If-Modified-Since: Sat, 15 Feb 2014 20:52:30 GMT
Response Headers
HTTP/1.1 304 Not Modified
x-amz-id-2: FvdtpH6WmRvEAFIt3clAsXC133iyGQ/Qezlzt/5P6UDFbZvDfUC7WeuPv+re0ywE
x-amz-request-id: FA51FED4F6A70DA2
Date: Sat, 15 Feb 2014 22:02:22 GMT
Access-Control-Allow-Origin: *
Access-Control-Allow-Methods: GET
Access-Control-Max-Age: 3000
Vary: Origin, Access-Control-Request-Headers, Access-Control-Request-Method
Last-Modified: Sat, 15 Feb 2014 20:52:30 GMT
ETag: "84cf04d01a85ed58af77293ea7b1884a"
Server: AmazonS3
认为可能是S3没有设置正确的Content-Type,我也有S3响应:
Content-Type: text/plain; charset="utf-8"
,但没有帮助。
有人有什么想法吗?
答案 0 :(得分:3)
这基本上发生了,因为$ http响应上的角度是通过$httpProvider.defaults.transformRequest
属性上的函数数组传递的。正如您在此处所见:https://github.com/angular/angular.js/blob/7aef2d54e0a48fae18a289813f699962d8310565/src/ng/http.js#L94数组中有一个默认函数。此函数检查一些基本的正则表达式,以查看它是否应该响应JSON.parse()。遗憾的是,这个格式错误会通过但您可以在配置块中覆盖transformResponse属性,或者您可以在实际的$http
调用中指定transformResponse属性,如下所示(来自您的小提琴):
var urlOpts1 = {
method: 'GET',
url: 'https://s3.amazonaws.com/forforf-cdn/not_json_test',
transformResponse: specialTransform
};
在上面的小提琴中,您可以看到“{not_json:{malformed on purpose}”被打印为常规字符串,因为我们只是在自定义transformResponse函数中直接返回字符串。