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

时间:2022-08-22 17:24:41


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: ?
12345678 @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

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

发现后台没有取到值

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

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:

?
12345678 @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, ?
12345 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,

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

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:

?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748 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:

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

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,

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

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:?
12345678 @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

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

发现后台没有取到值

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

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:

?
12345678 @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,?
12345 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,

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

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:

?
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748 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:

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

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,

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

isform已经可以正常接收到参数了,大功告成!