当我们尝试为我们获得的方法运行RPC命令时,我似乎无法弄清楚问题。它在本地工作但不在实时Linux服务器上工作。
TypeError:无法在C:\ ssc-exchange-tranactions \ app.js:23:13在Layer.handle中读取未定义的属性'method'[as handle_request](C:\ ssc-exchange-tranactions \ node_modules \ express \ lib \ router \ layer.js:95:5)at Route.dispatch(C:\ ssc-exchange)下一步(C:\ ssc-exchange-tranactions \ node_modules \ express \ lib \ router \ route.js:137:13) -tranactions \ node_modules \ express \ lib \ router \ route.js:112:3)在Layer.handle [as handle_request](C:\ ssc-exchange-tranactions \ node_modules \ express \ lib \ router \ layer.js:95) :5)在C:\ ssc-exchange-tranactions \ node_modules \ express \ lib \ router \ index.js:281:22 at Function.process_params(C:\ ssc-exchange-tranactions \ node_modules \ express \ lib \ router \ index.js:335:12)at jsonParser(C:\ ssc-exchange-tranactions \ node_modules \) body-parser \ lib \ types \ json.js:119:7)在Layer.handle [as handle_request](C:\ ssc-exchange-tranactions \ node_modules \ express \ lib \ router \ layer.js:95:5)
const express = require("express");
const bodyParser = require("body-parser");
const request = require("request");
const port = 5000;
const app = express();
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
const dsteem = require('dsteem');
const client = new dsteem.Client('https://api.site.com');
app.set('trust proxy', true);
app.disable('x-powered-by');
app.post('/', function(req,res){
try
{
var body=JSON.parse(req.body.curl);
}
catch(err)
{
res.send({msg: 'invalid command', error: err});
}
if(body.method !=undefined && body.method == "POST")
{
let options = {
url:body.url,
method:body.method,
headers:body.headers,
body: JSON.stringify(body.body)
};
request(options, (error, response, body) => {
if (error) {
console.error("An error has occurred: ", error);
res.send(error);
}
else {
let responseData = JSON.parse(body);
res.send(responseData);
}
});
}
///Ends if
else if(body.method != undefined && body.method == "GET")
{
let options = {
// url: body.url+'?account='+body.body.params.account+'&limit='+body.body.params.limit+
// '&offset='+body.body.params.offset+'&&symbol='+body.body.params.symbol,
url: 'https://api.site.com/accounts/history'+body.symbol,
method: "GET",
headers: {"Content-type": "application/json"},
};
request(options, (error, response, body) => {
if (error) {
console.error("An error has occurred: ", error);
res.send(error);
}
else {
var withdraw = [], deposit = [];
body= JSON.parse(body);
body.forEach(el => {
if(el.from == "account"){
delete el.block;
delete el.symbol;
delete el.from_type;
delete el.to_type;
withdraw.push(el);
}
else{
delete el.block;
delete el.symbol;
delete el.from_type;
delete el.to_type;
deposit.push(el);
}
});
res.json([{"WITHDRAWS": withdraw},{"DEPOSITS":deposit}]);
}
});
}
//ends else if
else
{
const active_key = body.wif;
const key = dsteem.PrivateKey.fromString(active_key);
const account = "account";
const my_id= "mainnet";
const my_data= {"contractName":"tokens", "contractAction":"transfer","contractPayload":{"symbol": "omg",
"to": body.to,"quantity":body.quantity,"memo": body.memo }};
client.broadcast.json({
required_auths: [account],
required_posting_auths: [],
id: my_id,
json: JSON.stringify(my_data),
}, key).then(
result => {res.send(result)},
error => {res.send({msg: 'Something went wrong', error: error})}
)
}
//ends else
});
app.listen(port, function () {
console.log("Server listening on port: " + port);
});
如果第一个try / catch块中出现错误,您的代码就会中断,这是您身边的语义错误。
try
{
var body=JSON.parse(req.body.curl);
}
catch(err)
{
res.send({msg: 'invalid command', error: err});
}
1. JS中的可变吊装
检查js中变量提升的主题:qazxsw poi
简而言之,基于您的示例,这意味着JS编译器将在函数的最顶部在post函数内创建一个名为body的变量,其初始值为undefined。发生这种情况是因为你使用了var关键字,而不是const / let。
只有在https://developer.mozilla.org/en-US/docs/Glossary/Hoisting正常工作的情况下,才会设置body变量的值。如果出现这种情况失败(看起来似乎发生了这种情况)或者出现错误,则正文将永久保持未定义状态,这意味着您无法访问其属性(如方法),因为它不是对象。
解决方案取决于您希望在此实现的目标:
这里重构的一个例子:
JSON.parse()
如果你想避免分成几个函数,你可以做类似的事情
app.post('/', function(req, res) {
try {
const body = JSON.parse(req.body.curl);
switch (body.method) {
case 'GET':
this.handleGETRequest();
case 'POST':
this.handlePOSTRequest();
default:
this.handleDefault();
}
} catch (err) {
res.send({ msg: 'invalid command', error: err });
}
});
考虑到所有内容都包含在try / catch中,无需在此处专门检查未定义的主体。