go10中服务端不能同时接收参数和文件

android 端使用retrofit2.30框架,实现文件和参数上传
代码如下

@Multipart
    @POST("/logUpload")
    Flowable<HttpResult> logUpload(@Part() List<MultipartBody.Part> files, @PartMap()Map<String,String> param);

接收端使用的是Go原生的处理器函数

http.HandleFunc("/uploadLog", UploadLog)
func UploadLog(w http.ResponseWriter, r *http.Request) {
    if r.Method == "POST" {

            fmt.Println("------HEAD------")
            for k, v := range r.Header {
                fmt.Println(k, ":", v)
            }

            r.ParseMultipartForm(32 << 20) //最大内存为32M
            mf := r.MultipartForm
            res0 := mf.Value
            fmt.Println("------VALUE--------")
            for k, v := range res0 {
                fmt.Println(k, ":", v)
            }
            res1 := mf.File
            if res1 != nil {
                fmt.Println("------FILE--------")
                fmt.Println("len = ", len(res1))
                for k, v := range res1 {
                    fmt.Println(k, ":", v)
                }
            }
    }
}

通过android代码测试结果如下:

        ------HEAD------
        Content-Length : [1038]
        Connection : [Keep-Alive]
        Accept-Encoding : [gzip]
        User-Agent : [okhttp/3.9.0]
        Content-Type : [multipart/form-data; boundary=fd8f02e0-a469-49d5-8d7a-9772589d9552]
        ------VALUE--------
        ------FILE--------
        len =  5
        vpnId : [0xc4200b0550]
        uId : [0xc4200b0410]
        problem : [0xc4200b0460]
        contactInfo : [0xc4200b04b0]
        appName : [0xc4200b0500]
        {"code":200,"msg":"提交成功"}

通过postman,服务器端打印结果如下
Headers

        Content-Type:multipart/form-data
        ------HEAD------
        Accept-Encoding : [gzip, deflate]
        User-Agent : [okhttp/3.9.0]
        Content-Type : [multipart/form-data; boundary=--------------------------015795290054340961609352]
        Accept : [*/*]
        Content-Length : [26676]
        Connection : [keep-alive]
        Cache-Control : [no-cache]
        Postman-Token : [64af6982-daa7-4cf7-a9f2-93ed2ab12f73]
        ------VALUE--------
        vpnId : [2avpa2dx]
        problem : [testaaa]
        uId : [23423223]
        contactInfo : [1454025171]
        appName : [unicorn]
        ------FILE--------
        len =  1
        log : [0xc42015a050 0xc42015a0a0 0xc42015a0f0]
        {"code":200,"msg":"提交成功"}

通过上面的结果发现android 穿的参数都在

File  map[string][]*FileHeader

里面,而postman上传的参数在如下参数里

Value map[string][]string

由于在android使用的是@Part相关的组件,导致,android传的参数和文件都会传到File变量中。

不知道哪位知道参数怎么从File变量中取出来!

下面是抓包对比

android 端抓包

            POST /logUpload HTTP/1.1
            Content-Type    multipart/form-data; boundary=e8e4e506-9e79-4c3d-80ea-e2a20152c914
            Content-Length  1054
            Host    192.168.6.93:3000
            Connection  Keep-Alive
            Accept-Encoding gzip
            User-Agent  okhttp/3.9.0


            --b74b2f2b-3aa6-43c7-90de-dc1692c5baa4
            Content-Disposition: form-data; name="uId"
            Content-Transfer-Encoding: binary
            Content-Type: text/plain; charset=UTF-8
            Content-Length: 35

            yk-d094d23be08a4a3e98b5c43c0f585c57
            --b74b2f2b-3aa6-43c7-90de-dc1692c5baa4
            Content-Disposition: form-data; name="problem"
            Content-Transfer-Encoding: binary
            Content-Type: text/plain; charset=UTF-8
            Content-Length: 27

            测试文件上传的时候
            --b74b2f2b-3aa6-43c7-90de-dc1692c5baa4
            Content-Disposition: form-data; name="contactInfo"
            Content-Transfer-Encoding: binary
            Content-Type: text/plain; charset=UTF-8
            Content-Length: 0


            --b74b2f2b-3aa6-43c7-90de-dc1692c5baa4
            Content-Disposition: form-data; name="vpnId"
            Content-Transfer-Encoding: binary
            Content-Type: text/plain; charset=UTF-8
            Content-Length: 8

            15204876
            --b74b2f2b-3aa6-43c7-90de-dc1692c5baa4
            Content-Disposition: form-data; name="appName"
            Content-Transfer-Encoding: binary
            Content-Type: text/plain; charset=UTF-8
            Content-Length: 7

            unicorn
            --b74b2f2b-3aa6-43c7-90de-dc1692c5baa4--

postman抓包

    POST /logUpload HTTP/1.1
cache-control   no-cache
Postman-Token   cb48fe3c-b31a-4038-b604-037016993e19
Content-Type    multipart/form-data; boundary=--------------------------799791663844586153468179
User-Agent  PostmanRuntime/6.2.5
Accept  */*
Host    127.0.0.1:3000
accept-encoding gzip, deflate
content-length  661
Connection  keep-alive


----------------------------799791663844586153468179
Content-Disposition: form-data; name="vpnId"

15204876
----------------------------799791663844586153468179
Content-Disposition: form-data; name="problem"

测试文件上传的时候
----------------------------799791663844586153468179
Content-Disposition: form-data; name="uId"

yk-d094d23be08a4a3e98b5c43c0f585c57
----------------------------799791663844586153468179
Content-Disposition: form-data; name="contactInfo"


----------------------------799791663844586153468179
Content-Disposition: form-data; name="appName"

unicorn
----------------------------799791663844586153468179--

最后结论:https://github.com/golang/go/issues/24041