angularjs中$http模块POST请求request payload转form data



这是我后台SpringMVC控制器接收isform参数的方法,只是简单的打出它的值:
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@RequestMapping (method = RequestMethod.POST)
     @ResponseBody
     public Map<String, Object> save(
             @RequestParam (value = "isform" , required = false ) String isform) {
         System.out.println( "isform value: " + isform);
         return null ;
 
     }
前台页面发送一个post提交表单的请求

发现后台没有取到值

后边我想到的第一种方案是在控制器方法参数里加requestbody来接收json参数,改成如下:

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@RequestMapping (method = RequestMethod.POST)
     @ResponseBody
     public Map<String, Object> save(
             @RequestParam (value = "isform" , required = false ) @RequestBody String isform) {
         System.out.println( "isform value: " + isform);
         return null ;
 
     }
但是isform的值结果还是为null,

接着我又对比了下以前的项目中,接收post请求的参数,发现一个有趣的现象,

下边是Angular的默认请求头,

$httpProvider.defaults.headers.post: (header defaults for POST requests)

Content-Type: application/json

$httpProvider.defaults.headers.put(header defaults for PUT requests)

Content-Type: application/json

其中Angular的post和put都是application/json,

而jquery的post请求的"Content-Type"默认为"  application/x-www-form-urlencoded ",于是我更改了angular的默认Content-Type,
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app.config( function ($httpProvider) {
     $httpProvider.defaults.headers.put[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
     $httpProvider.defaults.headers.post[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
 
});
接下来的请求body变成了这样,但是后边还是没有取到isform的值,

又查了半天,在一个老外的博客上发现了原因,链接如下:

http://victorblog.com/2012/12/20/make-angularjs-http-service-behave-like-jquery-ajax/

By default, jQuery transmits data using Content-Type: x-www-form-urlencoded and the familiar foo=bar&baz=moe serialization. AngularJS, however, transmits data using Content-Type: application/json and { "foo": "bar", "baz": "moe" } JSON serialization

自己翻译了:

默认情况下,jQuery传输数据使用Content-Type: x-www-form-urlencodedand和类似于"foo=bar&baz=moe"的序列,然而AngularJS,传输数据使用Content-Type: application/json和{ "foo": "bar", "baz": "moe" }这样的json序列。

所以下把Content-Type设置成x-www-form-urlencodedand之后,还需要转换序列的格式,

下边是我经过老外实践而自己测试过的最终方案:

?
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app.config( function ($httpProvider) {
     $httpProvider.defaults.headers.put[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
     $httpProvider.defaults.headers.post[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
 
     // Override $http service's default transformRequest
     $httpProvider.defaults.transformRequest = [ function (data) {
         /**
          * The workhorse; converts an object to x-www-form-urlencoded serialization.
          * @param {Object} obj
          * @return {String}
          */
         var param = function (obj) {
             var query = ' ';
             var name, value, fullSubName, subName, subValue, innerObj, i;
 
             for (name in obj) {
                 value = obj[name];
 
                 if (value instanceof Array) {
                     for (i = 0; i < value.length; ++i) {
                         subValue = value[i];
                         fullSubName = name + ' [ ' + i + ' ] ';
                         innerObj = {};
                         innerObj[fullSubName] = subValue;
                         query += param(innerObj) + ' & ';
                     }
                 } else if (value instanceof Object) {
                     for (subName in value) {
                         subValue = value[subName];
                         fullSubName = name + ' [ ' + subName + ' ] ';
                         innerObj = {};
                         innerObj[fullSubName] = subValue;
                         query += param(innerObj) + ' & ';
                     }
                 } else if (value !== undefined && value !== null) {
                     query += encodeURIComponent(name) + ' = '
                             + encodeURIComponent(value) + ' & ';
                 }
             }
 
             return query.length ? query.substr(0, query.length - 1) : query;
         };
 
         return angular.isObject(data) && String(data) !== ' [object File]'
                 ? param(data)
                 : data;
     }];
});
在angular模块中添加以上代码,我们来看下效果:

发现与jquery的post请求风格一致了,有木有!!!

看下后台的参数接收情况,

isform已经可以正常接收到参数了,大功告成!

这是我后台SpringMVC控制器接收isform参数的方法,只是简单的打出它的值:
?
1
2
3
4
5
6
7
8
@RequestMapping (method = RequestMethod.POST)
     @ResponseBody
     public Map<String, Object> save(
             @RequestParam (value = "isform" , required = false ) String isform) {
         System.out.println( "isform value: " + isform);
         return null ;
 
     }
前台页面发送一个post提交表单的请求

发现后台没有取到值

后边我想到的第一种方案是在控制器方法参数里加requestbody来接收json参数,改成如下:

?
1
2
3
4
5
6
7
8
@RequestMapping (method = RequestMethod.POST)
     @ResponseBody
     public Map<String, Object> save(
             @RequestParam (value = "isform" , required = false ) @RequestBody String isform) {
         System.out.println( "isform value: " + isform);
         return null ;
 
     }
但是isform的值结果还是为null,

接着我又对比了下以前的项目中,接收post请求的参数,发现一个有趣的现象,

下边是Angular的默认请求头,

$httpProvider.defaults.headers.post: (header defaults for POST requests)

Content-Type: application/json

$httpProvider.defaults.headers.put(header defaults for PUT requests)

Content-Type: application/json

其中Angular的post和put都是application/json,

而jquery的post请求的"Content-Type"默认为"  application/x-www-form-urlencoded ",于是我更改了angular的默认Content-Type,
?
1
2
3
4
5
app.config( function ($httpProvider) {
     $httpProvider.defaults.headers.put[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
     $httpProvider.defaults.headers.post[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
 
});
接下来的请求body变成了这样,但是后边还是没有取到isform的值,

又查了半天,在一个老外的博客上发现了原因,链接如下:

http://victorblog.com/2012/12/20/make-angularjs-http-service-behave-like-jquery-ajax/

By default, jQuery transmits data using Content-Type: x-www-form-urlencoded and the familiar foo=bar&baz=moe serialization. AngularJS, however, transmits data using Content-Type: application/json and { "foo": "bar", "baz": "moe" } JSON serialization

自己翻译了:

默认情况下,jQuery传输数据使用Content-Type: x-www-form-urlencodedand和类似于"foo=bar&baz=moe"的序列,然而AngularJS,传输数据使用Content-Type: application/json和{ "foo": "bar", "baz": "moe" }这样的json序列。

所以下把Content-Type设置成x-www-form-urlencodedand之后,还需要转换序列的格式,

下边是我经过老外实践而自己测试过的最终方案:

?
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3
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app.config( function ($httpProvider) {
     $httpProvider.defaults.headers.put[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
     $httpProvider.defaults.headers.post[ 'Content-Type' ] = 'application/x-www-form-urlencoded' ;
 
     // Override $http service's default transformRequest
     $httpProvider.defaults.transformRequest = [ function (data) {
         /**
          * The workhorse; converts an object to x-www-form-urlencoded serialization.
          * @param {Object} obj
          * @return {String}
          */
         var param = function (obj) {
             var query = ' ';
             var name, value, fullSubName, subName, subValue, innerObj, i;
 
             for (name in obj) {
                 value = obj[name];
 
                 if (value instanceof Array) {
                     for (i = 0; i < value.length; ++i) {
                         subValue = value[i];
                         fullSubName = name + ' [ ' + i + ' ] ';
                         innerObj = {};
                         innerObj[fullSubName] = subValue;
                         query += param(innerObj) + ' & ';
                     }
                 } else if (value instanceof Object) {
                     for (subName in value) {
                         subValue = value[subName];
                         fullSubName = name + ' [ ' + subName + ' ] ';
                         innerObj = {};
                         innerObj[fullSubName] = subValue;
                         query += param(innerObj) + ' & ';
                     }
                 } else if (value !== undefined && value !== null) {
                     query += encodeURIComponent(name) + ' = '
                             + encodeURIComponent(value) + ' & ';
                 }
             }
 
             return query.length ? query.substr(0, query.length - 1) : query;
         };
 
         return angular.isObject(data) && String(data) !== ' [object File]'
                 ? param(data)
                 : data;
     }];
});
在angular模块中添加以上代码,我们来看下效果:

发现与jquery的post请求风格一致了,有木有!!!

看下后台的参数接收情况,

isform已经可以正常接收到参数了,大功告成!

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