英文:
Batch JSON-RPCs in Go with Gorilla RPC
问题
好的，我会为你翻译这段代码。以下是翻译的结果：
好的，所以我正在开发一个服务器。它提供网页服务和其他服务。
package main
import (
"fmt"
"log"
"net/http"
"github.com/gorilla/rpc"
"github.com/gorilla/rpc/json"
)
type Service struct {
Name string
}
type ServiceArgs struct {
Str string
Val float64
}
type ServiceReply struct {
Message string
}
func (e *Service) DoSomething(request *http.Request, args *ServiceArgs, reply *ServiceReply) error {
fmt.Println("DoSomething called remotely!")
reply.Message = "OMG. It works."
return nil
}
func main() {
rpcHandler := rpc.NewServer()
rpcHandler.RegisterCodec(json.NewCodec(), "application/json")
rpcHandler.RegisterService(new(Service), "")
http.Handle("/rpc", rpcHandler)
http.Handle("/", http.StripPrefix("/", http.FileServer(http.Dir("."))))
fmt.Println("Listening on port 8080.")
if err := http.ListenAndServe(":8080", nil); err != nil {
log.Fatalln(err)
}
}
我在服务器端有一个API，我希望普通客户端能够访问它。为此，我开始学习更多关于JSON-RPC的知识。这是我如何从Web浏览器中调用Service.DoSomething的方法。
var log = document.getElementById("log");
var request = new XMLHttpRequest();
var command = {
"jsonrpc":"2.0",
"method":"Service.DoSomething",
"params":[{
"Str":"pie",
"Val":3.14
}],
"id":1
};
request.onreadystatechange = function() {
if (request.readyState == 4 && request.status == 200) {
var response = JSON.parse(request.responseText).result;
log.textContent += response["Message"];
} else {
console.log(request.statusText);
}
};
request.open("POST", "/rpc", true);
request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
request.send(JSON.stringify(command));
这个方法可以正常工作。当我运行这段JavaScript代码时，在浏览器中看到了"OMG. It works."。接下来，我想运行多个方法调用。我发现有一种方法可以向服务器发送一个"批处理"的调用。所以我尝试了以下JavaScript代码。
var command = [
{"jsonrpc":"2.0","method":"Service.DoSomething","params":[{"Str":"pie","Val":3.14}],"id":1},
{"jsonrpc":"2.0","method":"Service.DoSomething","params":[{"Str":"pie","Val":3.14}],"id":2}
];
request.send(JSON.stringify(command));
然而，这给我返回了一个400 (Bad Request)的错误。我在语法上搞错了吗？还是这是gorilla/rpc的问题？
英文:
Okay, so I'm working a server. It serves webpages and provides other services.
package main
import (
"fmt"
"log"
"net/http"
"github.com/gorilla/rpc"
"github.com/gorilla/rpc/json"
)
type Service struct {
Name string
}
type ServiceArgs struct {
Str string
Val float64
}
type ServiceReply struct {
Message string
}
func (e *Service) DoSomething(request *http.Request, args *ServiceArgs, reply *ServiceReply) error {
fmt.Println("DoSomething called remotely!")
reply.Message = "OMG. It works."
return nil
}
func main() {
rpcHandler := rpc.NewServer()
rpcHandler.RegisterCodec(json.NewCodec(), "application/json")
rpcHandler.RegisterService(new(Service), "")
http.Handle("/rpc", rpcHandler)
http.Handle("/", http.StripPrefix("/", http.FileServer(http.Dir("."))))
fmt.Println("Listening on port 8080.")
if err := http.ListenAndServe(":8080", nil); err != nil {
log.Fatalln(err)
}
}
I have an API on the server side that I want normal clients to be able to access. For this, I started learning more about JSON-RPC. This is how I call Service.DoSomething from a web browser.
var log = document.getElementById("log");
var request = new XMLHttpRequest();
var command = {
"jsonrpc":"2.0",
"method":"Service.DoSomething",
"params":[{
"Str":"pie",
"Val":3.14
}],
"id":1
};
request.onreadystatechange = function() {
if (request.readyState == 4 && request.status == 200) {
var response = JSON.parse(request.responseText).result;
log.textContent += response["Message"];
} else {
console.log(request.statusText);
}
};
request.open("POST", "/rpc", true);
request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
request.send(JSON.stringify(command));
This works fine. I see "OMG. It works." in my browser when I run that JavaScript. Next, I wanted to run multiple method calls. I found that there is a way to send a "batch" of calls to the server. So I tried this from JavaScript.
var command = [
{"jsonrpc":"2.0","method":"Service.DoSomething","params":[{"Str":"pie","Val":3.14}],"id":1},
{"jsonrpc":"2.0","method":"Service.DoSomething","params":[{"Str":"pie","Val":3.14}],"id":2}
];
request.send(JSON.stringify(command));
However, this gives me a 400 (Bad Request). Did I screw up the syntax somewhere? Or is this a problem with gorilla/rpc?
答案1
得分: 2
根据The Gorilla Toolkit JSON-RPC概述：
该包遵循JSON-RPC 1.0规范：
根据JSON-RPC规范和JSON-RPC Google讨论组，“batch”是JSON-RPC 2.0的一个特性。
看起来Gorilla JSON-RPC不支持批量查询。
英文:
According to The Gorilla Toolkit JSON-RPC overview:
>This package follows the JSON-RPC 1.0 specification:
According to The JSON-RPC spec, and the JSON-RPC Google group discussion, 'batch' is a JSON-RPC 2.0 feature.
It looks like Gorilla JSON-RPC doesn't understand the batched queries.
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