digitalmars.D.learn - What makes vibe.d Incredibly Slow on a VPS?
- seany (172/172) Mar 18 2023 Consider this fraction of code Please:
- Steven Schveighoffer (10/16) Mar 18 2023 Before getting into it any further, try flushing output after every writ...
Consider this fraction of code Please:
void createNewOwner(HTTPServerRequest req,
HTTPServerResponse res) {
writeln("NEW OWNER requests are : -----");
writeln(req.form);
writeln(req.files);
writeln("==============");
// TASK EXTRACT the data from the POST variable//
--------------------------------------------------------------------------------------------------------------//
// TODO check security with req.form["loginToken"];
string avatarPath ;
if( req.files.length != 0) {
// HERE we only check if file is supplied...
// no "existing avatar" yet, as fresh new user.
auto file = "file" in req.files;
if (file.filename != "" ) {
string k = genNonce(); // Generate a random
number to ensure there is no conflict
string rp = req.form["username"].replace(" ",
"-").replace(" ", "-")~"-"~k~"-"~(file.filename.name).replace("
", "-").replace(" ", "-");
// replaced spaces with "-" and with
-, to avoid loading problems
try {
moveFile(file.tempPath.toString(),
"assets/images/avatars/" ~ rp); writeln("Uploaded
successfully!");
avatarPath = "/" ~ "assets/images/avatars/" ~ rp;
} catch (Exception e) {
writeln("Exception thrown, trying
copy");
copyFile(file.tempPath.toString(),
"assets/images/avatars/" ~ rp);
avatarPath = "/" ~ "assets/images/avatars/" ~ rp;
}
}
} else {
avatarPath =
"assets/images/avatars/noFace.png"; // Here it is
allowed. IF no image, then set a default.
}
avatarPath = avatarPath.replace(" ", ""); //
should not be needed, but just in case
avatarPath = avatarPath.replace(" ", "-");
string e2fa = "";
req.form["en2fa"] == "true" ? (e2fa = "1") : (e2fa =
"0"); // converted e2FA to 0 or 1, in string format
// TASK confirm no conclict //
----------------------------------------------------------------------------------------------------------------------------------//
auto check_existingUser = loginRoutines.get_userAllInfo(
req.form["username"]);
if (check_existingUser.length != 0) { //
username already exists.... The only valid value here is 0
// = no records. anything != 0 will
be rejected
res.writeBody("ERROR: 30LX-USEREX. Username existiert
schon... Verwenden Sie bitte einen anderen Username.");
return;
}
// TASK set entry details //
------------------------------------------------------------------------------------------------------------------------------------//
int usrCnt =
loginRoutines.get_userCount(); write("user count is:
"); writeln(usrCnt);
if (usrCnt < 0) {
res.writeBody("ERROR: 71QM-UKNDBR. Unbekannter
Datenbankfehler. Versuchen Sie später erneut.");
return;
}
string cntr = to!string(usrCnt +1); // next
item in file.
string[string] nuInfo ; // container for new
user Info
nuInfo["username"] = req.form["username"];
nuInfo["fName"] = req.form["fName"];
nuInfo["lName"] = req.form["lName"];
nuInfo["avatarPath"]= avatarPath;
nuInfo["mail"] = req.form["mail"];
nuInfo["tel"] = req.form["tel"];
nuInfo["mob"] = req.form["mob"];
string[string] lgInfo;
lgInfo["username"] = req.form["username"];
lgInfo["role"] = "owner";
lgInfo["active"] = "-1"; write("going to add
signUp line in user dtls : "); writeln(lgInfo);
string loginInfo = cntr ~ "," ~ req.form["username"] ~ "," ~
"++++++++++++++++++++++" ~ "," ~ e2fa ~ ", 0";
// enter new user with supplied 2FA,
but set the last field = 0,
// as not yet paired.
// TASK insert the data //
--------------------------------------------------------------------------------------------------------------------------------------//
bool stat; write("going to add signUp
line in owner dtls : "); writeln(nuInfo);
stat = databaseRoutines.add_newRecord(nuInfo,
"data/ownerDTLS.db");
write("User INFORMATION insertion
success : "); writeln(stat);
if (! stat) {
res.writeBody("ERROR: 35TG-DTLSER. Das erstellen vom
eingegebenen User war nicht erfolgreich. Bitte versuchen sie
später erneut.");
return;
}
stat = databaseRoutines.add_newRecord(lgInfo,
"data/userRoles.db");
write("User ROLE insertion success :
"); writeln(stat);
if (! stat) {
res.writeBody("ERROR: 36TG-ROLEER. Das erstellen vom
eingegebenen User war nicht erfolgreich. Bitte versuchen sie
später erneut.");
return;
}
stat =
loginRoutines.write_loginDtls(loginInfo); write("User
login insertion success : "); writeln(stat);
if (! stat) {
res.writeBody("ERROR: 37TG-LGINER. Das erstellen vom
eingegebenen User war nicht erfolgreich. Bitte versuchen sie
später erneut.");
return;
}
string command = "bash mail.sh "~nuInfo["mail"]~"
"~nuInfo["mail"]; write("Executing : "); writeln(command);
auto ml = executeShell("bash mail.sh "~nuInfo["mail"]~"
"~nuInfo["mail"]); writeln("mail has been sent .... ");
writeln(ml.status);
writeln(ml.output);
// TASK create a new file //
------------------------------------------------------------------------------------------------------------------------------------//
stat =
databaseRoutines.create_newDatabase("data/history-"~req.form["username"]~
".db", "username, timeString, text, label");
write("history file creation success:
");writeln(stat);
if (! stat) {
res.writeBody("ERROR: 38TG-NOHSTR. Das erstellen vom
eingegebenen User war nicht erfolgreich. Kontaktieren Sie den
Administrator.");
return;
} // file at Path with scheme is created
string[string] hist;
SysTime nowTime = Clock.currTime();
string timeStr = to!string(nowTime.day) ~"." ~
to!string(nowTime.month) ~"."~
to!string(nowTime.year) ~"."~ " "~
to!string(nowTime.hour) ~":"~
to!string(nowTime.minute) ;
hist["username"] = req.form["username"];
hist["timeString"] = timeStr;
hist["text"] = "User wurde Angelegt";
hist["label"] = "2";
stat = databaseRoutines.add_newRecord(hist,
"data/history-"~req.form["username"]~ ".db"); write("history file
creation success: ");writeln(stat);
if (! stat) {
res.writeBody("ERROR: 39TG-HSTRER. Das erstellen vom
eingegebenen User war nicht erfolgreich. Kontaktieren Sie den
Administrator.");
return;
} // record added
res.writeBody("Eine Email wurde versandt, um das Onboarding
fertigzustellen. " );
}
Basically, I am trying to add some Records in a File. It works on
my localhost.
But on a VPS server, the program outputs the first writeln line
(not even the consequent req.form printouts), then apparently
stops for several seconds ( 10 to 16) , and then suddenly starts
working again. I see this in the log outputs.
Why does this happen? How can I start debugging?
thank You
Mar 18 2023
Steven Schveighoffer <schveiguy gmail.com> On 3/18/23 9:36 AM, seany wrote:But on a VPS server, the program outputs the first writeln line (not even the consequent req.form printouts), then apparently stops for several seconds ( 10 to 16) , and then suddenly starts working again. I see this in the log outputs. Why does this happen? How can I start debugging?Before getting into it any further, try flushing output after every writeln. This is true in D and C too -- if your `stdout` stream is connected to a log file, it will *not* flush upon every newline. However, if it's connected to a terminal, it *will* flush upon every newline. It's possible it is running just as fast as you expect, but the buffered output has not yet been flushed. So just add `stdout.flush()` after every `writeln` call and see if it helps. If not, then it needs more investigation. -Steve
Mar 18 2023