我是Go的新手,但到目前为止,我非常喜欢它。
我有个问题,我找不出来。我正在将一个API从Node迁移到Go,并且存在这个日志,我必须捕获POST正文 原样 并将其保存到 jsonb 在Postgresql数据库中输入列。
这意味着我不能使用 struct 或任何预定的内容。
POST是使用body raw Content-Type:application / json 制作的,如下所示: <$ $ {debug:false,order_id_gea:326064,increment_id_gea:200436102,date: 2017-05-18T01:44:44 + 00:00,total_amount:10000.00,currency:MXN,payment_method:Referencia bancaria, reference:857374,买家:{buyer_id_gea:1234,全名:Juan Perez Martinez,电子邮件:juanperez@gmail,电话:5512341234},产品:[ {sku: PEP16114,price:10000.00,currency:MXN,学生:{school_id_gea:172, grade_id_gea:119,level_id_ gea:36,name:Benancio,last_name:Perez,second_last_name:Garcia,email: benancio@gmail} ] }
Node + Hapi非常简单:
const payload = request.payload然后我可以从有效负载访问JSON。
我使用Go with Echo,所以 context 是一个包装器,我可以在其中找到 Request()* http.Request 。
我已经尝试了以下方法,但每次结果都为空或者是空的,因为它是空的:
var v interface {} err:= json.NewDecoder(context.Request()。Body).Decode(& v) if err!= nil { return result ,err } fmt.Println(v)结果:EOF
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m:= echo.Map {} if err:= context.Bind(& m); err!= nil {返回结果,err } fmt.Println(m)结果代码400,消息EOF
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body,error:= ioutil.ReadAll(context.Request()。Body) if error!= nil {返回结果,错误} fmt。 Println(body)结果[]
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我错过了什么和/或做错了什么?谢谢!
解决方案TIL http.Response.Body 是一个缓冲区,这意味着一旦它被读取,它就不能被再次读取。
它就像一股水流,你可以看到它并在它经过时测量它,但是一次它已经消失了,它已经消失了。
然而,知道这一点,有一个解决方法,你需要抓住主体并恢复它:
//读取正文内容 var bodyBytes [] byte if context.Request()。Body!= nil { bodyBytes,_ = ioutil.ReadAll(context.Request()。Body)} //将io.ReadCloser恢复到原始状态 context.Request( ).Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes)) //继续使用Body,如将它绑定到一个结构体: order:= new(models.GeaOrder ) error:= context.Bind(order)现在,您可以使用 context.Request()。Body 其他地方。
S资源:
grokbase/t/gg/golang-nuts/12adq8a2ys/go-nuts-re-reading-http-response-body-or -any-reader
medium/@xoen/golang-read-from-an-io-readwriter-without-loosing-its-content-2c6911805361
I'm a newbie with Go, but so far I'm liking it very much.
I have a problem I can't figure out. I'm migrating an API from Node to Go and there is this log where I have to capture the Body of a POST AS IT IS and save it to a jsonb type column in a Postgresql database.
This means I can't use a struct or anything predetermined.
The POST is made with body raw Content-Type: application/json like so:
{ "debug": false, "order_id_gea": 326064, "increment_id_gea": 200436102, "date": "2017-05-18T01:44:44+00:00", "total_amount": 10000.00, "currency": "MXN", "payment_method": "Referencia bancaria", "reference": "857374", "buyer": { "buyer_id_gea": 1234, "full_name": "Juan Perez Martinez", "email": "juanperez@gmail", "phone": "5512341234" }, "products": [ { "sku":"PEP16114", "price": 10000.00, "currency": "MXN", "student": { "school_id_gea": 172, "grade_id_gea": 119, "level_id_gea": 36, "name": "Benancio", "last_name": "Perez", "second_last_name": "Garcia", "email": "benancio@gmail" } } ] }On Node + Hapi is quite simple:
const payload = request.payloadand then I can access the JSON from payload.
I am using Go with Echo, so context is a wrapper where I can find Request() *http.Request.
I have tried the following, but everytime the result is empty or an error because it is empty:
var v interface{} err := json.NewDecoder(context.Request().Body).Decode(&v) if err != nil { return result, err } fmt.Println(v)Result: EOF
--
m := echo.Map{} if err := context.Bind(&m); err != nil { return result, err } fmt.Println(m)Result code 400, message EOF
--
body, error := ioutil.ReadAll(context.Request().Body) if error != nil { return result, error } fmt.Println(body)Result []
--
What am I missing and/or doing wrong? Thanks!
解决方案TIL that http.Response.Body is a buffer, which means that once it has been read, it cannot be read again.
It's like a stream of water, you can see it and measure it as it passes but once it's gone, it's gone.
However, knowing this, there is a workaround, you need to "catch" the body and restore it:
// Read the Body content var bodyBytes []byte if context.Request().Body != nil { bodyBytes, _ = ioutil.ReadAll(context.Request().Body) } // Restore the io.ReadCloser to its original state context.Request().Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes)) // Continue to use the Body, like Binding it to a struct: order := new(models.GeaOrder) error := context.Bind(order)Now, you can use context.Request().Body somewhere else.
Sources:
grokbase/t/gg/golang-nuts/12adq8a2ys/go-nuts-re-reading-http-response-body-or-any-reader
medium/@xoen/golang-read-from-an-io-readwriter-without-loosing-its-content-2c6911805361
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