<p>Here is my problem i'am debugging my app, i have to receive some json from one of my server.</p>
<p>It works fine and i map the json to a struct.</p>
<p>but for curiosity an debugging purpose i would like to see the raw json receive by my golang server.</p>
<p>here is my code :</p>
<pre><code>func put_id(w http.ResponseWriter, r *http.Request) {
var data_send return_data
data_send.Code = 200
data_json, err := json.Marshal(data_send)
if (err != nil){
Info.Println("error")
Info.Println(err)
}
decoder := json.NewDecoder(r.Body)
var t img
err2 := decoder.Decode(&t)
if (err2 != nil){
Info.Println("error")
Info.Println(err2)
}
var body struct {
// httpbin.org sends back key/value pairs, no map[string][]string
Headers map[string]string `json:"headers"`
Origin string `json:"origin"`
}
err3 := decoder.Decode(&body)
if (err3 != nil){
Info.Println("error")
Info.Println(err3)
}
body2, err4 := ioutil.ReadAll(r.Body)
if err4 != nil {
log.Fatalf("ERROR: %s", err4)
}
Info.Println(body2)
Info.Println(t.IdMongo)
Info.Println(t.Name)
Info.Println(t.IdMongoImg)
Info.Println(body)
var ti img_pic
ti.IdMongo = t.IdMongoImg
ti.Name = t.Name
ti.Type = t.Type
ti.Img_base64 = t.Img_base64
ti.ImgId = t.ImgId
t.Img_base64 = ""
recordImgMongo(t,ti)
recordImgRedis(t)
w.Header().Set("Content-Type", "application/json")
w.Header().Set("Content-Length", strconv.Itoa(len(data_json))) //len(dec)
w.Write(data_json)
}
</code></pre>
<p>Everything works fine but for curiosity i would like to see the raw json as text.</p>
<p>I've tried some things but none works (as body and body2 show)</p>
<p>Thanks and regards</p>
<hr/>**评论：**<br/><br/>sairamk: <pre><p>You can use <a href="https://godoc.org/net/http/httputil#DumpRequest" rel="nofollow">DumpRequest</a> from <a href="https://godoc.org/net/http/httputil" rel="nofollow">net/http/httputil</a> package.</p>
<p>This gives both the body and headers. </p>
<p>Reads the body from the request if not read.</p>
<blockquote>
<p>body2, err4 := ioutil.ReadAll(r.Body)</p>
</blockquote></pre>bussiere: <pre><p>thanks but sorry i don't understand your answer ...</p></pre>j_d_q: <pre><p>The standard library has a built in helper for this</p>
<pre><code>byts, _ := httputil.DumpRequest(r, true)
fmt.Println(string(byts))
</code></pre>
<p>Look at the <a href="https://golang.org/pkg/net/http/httputil/#DumpRequest" rel="nofollow">DumpRequest docs</a>, they're pretty well documented</p>
<p>Edit: he linked both. Those two links will output everything visible about the request</p></pre>bussiere: <pre><p>thanks</p></pre>teepark: <pre><p>Your problem in the code above is that <code>decoder.Decode()</code> will consume the entire request body, then it won't be available to anything else afterwards. That's why <code>body</code> and <code>body2</code> get nothing.</p>
<p>The cleanest solution is to use a <a href="https://godoc.org/io#TeeReader" rel="nofollow">TeeReader</a> to wrap <code>r.Body</code> (as the reader) and a new <code>bytes.Buffer</code> (as the writer), then decode from that. Now you should have the raw bytes in the buffer, having only consumed the request body once since the TeeReader handled saving it off at the same time.</p></pre>bussiere: <pre><p>thanks</p></pre>SilentWeaponQuietWar: <pre><p>I prefer the go-spew package for getting easy to read output</p>
<p><a href="https://github.com/davecgh/go-spew" rel="nofollow">https://github.com/davecgh/go-spew</a></p>
<blockquote>
<p>spew.Dump(data_json)</p>
</blockquote></pre>bussiere: <pre><p>thanks</p></pre>
