我有一个很大的多节脚本，其中包含很多循环和一些递归。当我在非常大的数据集上运行它时，脚本将停止运行。它以0退出代码停止。显然，它实际上并没有完成运行……只是……停止了。
asyncLib.waterfall([
getPronghornToken,
saveSchedulers,
saveServices,
populateServRefs,
saveServiceGroups,
saveNetworks,
populateNetRefs, //never actually gets out of this function. Just exits with code 0
saveNetworkGroups,
saveRuleGroups,
fetchRuleGroupIds,
populateRules,
saveRules,
getPolicyId,
linkRuleGroup
], function (err, result) {
if (err){
console.error("Something bad happened. Please try again");
process.exit(1);
}
console.log("done");
});
我要查找的内容：为什么脚本只在循环中停止并以0代码退出？
注意：备用代码。
getPronghornToken((err, token) => {
if(err) {
console.log("Error occured getPronghornToken");
throw err;
}
saveSchedulers(token, (err, token) => {
if(err) {
console.log("Error occured saveSchedulers");
throw err;
}
saveServices(token, (err, token) => {
if(err) {
console.log("Error occured saveServices");
throw err;
}
populateServRefs(token, (err, token) => {
if(err) {
console.log("Error occured populateServRefs");
throw err;
}
saveServiceGroups(token, (err, token) => {
if(err) {
console.log("Error occured saveServiceGroups");
throw err;
}
saveNetworks(token, (err, token) => {
if(err) {
console.log("Error occured saveNetworks");
throw err;
}
populateNetRefs(token, (err, token) => {
if(err) {
console.log("Error occured populateNetRefs");
throw err;
}
saveNetworkGroups(token, (err, token) => {
if(err) {
console.log("Error occured saveNetworkGroups");
throw err;
}
saveRuleGroups(token, (err, token) => {
if(err) {
console.log("Error occured saveRuleGroups");
throw err;
}
fetchRuleGroupIds(token, (err, token) => {
if(err) {
console.log("Error occured fetchRuleGroupIds");
throw err;
}
populateRules(token, (err, token) => {
if(err) {
console.log("Error occured populateRules");
throw err;
}
saveRules(token, (err, token) => {
if(err) {
console.log("Error occured saveRules");
throw err;
}
getPolicyId(token, (err, token) => {
if(err) {
console.log("Error occured getPolicyId");
throw err;
}
linkRuleGroup(token, (err, token) => {
if(err) {
console.log("Error occured linkRuleGroup");
throw err;
}
console.log("Successfully installed all files");
});
});
});
});
});
});
});
});
});
});
});
});
});
});
没有引发错误。不打印最里面的消息。回调模式已验证。
上次运行的功能如下：
async function populateNetRefs(token, callback) {
//let newNetRefs = [];
for(let index = 0; index < networkGroups.length; index++) {
if (index >= networkGroups.length) {
console.log("Net Refs Finished")
return callback(null, token);
}
let networkGroup = networkGroups[index];
try {
console.log(`fetching network number: ${index+1} / ${networkGroups.length}`);
let newNetRefs = await fetchNetId(token, networkGroup._netRefs);
networkGroup._netRefs = newNetRefs;
} catch (err) {
console.log(`An error occurrent fetching the network id for index ${index+1} / ${networkGroups.length}: ${err}`);
}
}
}
内部功能：
function fetchNetId(token, _netRefs) {
let fetchFinished = 0;
let newNetRefs = [];
let errCount = 1;
console.log("ZZ Fetchid Start ZZ");
return new Promise((resolve, reject) => {
_netRefs.forEach(function(_netRef) {
let options = {
//Required to be hidden
};
let req = https.request(options, (res) => {
let reply = [];
res.setEncoding('utf8');
res.on('data', (chunk) => {
console.log("YY GET DATA CHUNK YY");
reply.push(chunk);
});
res.on('end', () => {
fetchFinished++;
console.log("Reply is : " + reply.join());
//There is some logic in this spot. Not for you.
console.log("fetchFinished is: " + fetchFinished + ", size is: " + _netRefs.length);
if (fetchFinished === _netRefs.length) {
resolve(newNetRefs);
}
});
});
req.on('error', (e) => {
console.error(`problem with request ${errCount++}: ${e.message}`);
//reject(e);
});
let body = JSON.stringify({
"options" : {
"start": 0,
"limit": 5,
"sort": {
},
"filter": {
"name":{"$eq":_netRef}
}
}
});
console.log("XX Sending Request XX");
req.write(body);
req.end();
});
});
}
行为更新-更多控制台日志
这是控制台日志的结尾：
fetching network number: 49 / 711
ZZ Fetchid Start ZZ
XX Sending Request XX
XX Sending Request XX
YY GET DATA CHUNK YY
Reply is : {hidden from you}
TroubleShootingDias: some guid
fetchFinished is: 1, size is: 2
YY GET DATA CHUNK YY
Reply is : {hidden from you}
TroubleShootingDias: some guid
fetchFinished is: 2, size is: 2
fetch success
fetching network number: 50 / 711
ZZ Fetchid Start ZZ
[vagrant@vag-host1 space-parser]$
答案 0 :(得分：1)
我强烈建议您查看async.waterfall来帮助构建这样的代码，因为它可能是调试和阅读的母马。在上面的代码中有很多要掌握的地方，但是将以下内容包装在try catch中可能会有所帮助。当您处理请求错误时-这些仅是请求错误，并且可能会包含其他一些内容，包括可能格式错误的url等，并且在这种情况下您不会返回诺言。
try {
let req = https.request(options, (res) => {
let reply = [];
res.setEncoding('utf8');
res.on('data', (chunk) => {
console.log("YY GET DATA CHUNK YY");
reply.push(chunk);
});
res.on('end', () => {
fetchFinished++;
console.log("Reply is : " + reply.join());
//There is some logic in this spot. Not for you.
console.log("fetchFinished is: " + fetchFinished + ", size is: " + _netRefs.length);
if (fetchFinished === _netRefs.length) {
resolve(newNetRefs);
}
});
});
req.on('error', (err) => {
console.error(`problem with request ${errCount++}: ${err.message}`);
return reject(err);
});
}
catch(err) {
console.error(`problem with request ${err.message}`);
return reject(err);
}
答案 1 :(得分：1)
问题的实际解决方案：如果数组为空，则承诺将永远无法解决。在循环之前，在最顶部添加了一个空支票。
Set WshShell = WScript.CreateObject("WScript.Shell")
Set oShell = CreateObject("WScript.Shell")
WshShell.AppActivate "IMPORT"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{TAB}"
WshShell.SendKeys "{ENTER}"