如何从请求的正文中获取JSON [英] How to get the JSON from the Body of a Request on Go
问题描述
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.com,
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.com
}
]
}
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
-
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
-
body,error:= ioutil.ReadAll(context.Request()。Body)
if error!= nil {
返回结果,错误
}
fmt。 Println(body)
结果[]
-
我错过了什么和/或做错了什么?谢谢!
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:
http://grokbase.com/t/gg/golang-nuts/12adq8a2ys/go-nuts-re-reading-http-response-body-or -any-reader
https://medium.com/@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.com",
"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.com"
}
}
]
}
On Node + Hapi is quite simple:
const payload = request.payload
and 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!
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:
http://grokbase.com/t/gg/golang-nuts/12adq8a2ys/go-nuts-re-reading-http-response-body-or-any-reader
https://medium.com/@xoen/golang-read-from-an-io-readwriter-without-loosing-its-content-2c6911805361
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