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Author
Topic: fpweb and sqlquery (Read 4783 times)
dasa2
New member
Posts: 9
fpweb and sqlquery
«
on:
June 14, 2021, 10:19:02 pm »
I am building an HTTP server application with fpweb and want to run a sqlquery to verify that the username exist in db but getting an access violation when i try to run my sqlquery. What am i doing wrong here?
with SQLQuery1 do -> SQLQuery1 = <TSQLQUERY> = Cannot access memory at address 0x170
Code: Pascal
[Select]
[+]
[-]
unit
umain
;
{$mode objfpc}{$H+}
interface
uses
SysUtils
,
Classes
,
httpdefs
,
fpHTTP
,
fpWeb
,
SQLDB
,
DB
,
SQLite3Conn
,
httproute
;
type
{ TFPWebModule1 }
TFPWebModule1
=
class
(
TFPWebModule
)
SQLConnector1
:
TSQLConnector
;
SQLTransaction1
:
TSQLTransaction
;
SQLQuery1
:
TSQLQuery
;
procedure
DoStart
(
ARequest
:
TRequest
;
AResponse
:
TResponse
)
;
private
public
end
;
var
FPWebModule1
:
TFPWebModule1
;
implementation
{$R *.lfm}
{ TFPWebModule1 }
procedure
TFPWebModule1
.
DoStart
(
ARequest
:
TRequest
;
AResponse
:
TResponse
)
;
var
user
:
String
;
begin
user
:
=
ARequest
.
ContentFields
.
Values
[
'user'
]
;
if
user
=
EmptyStr
then
with
AResponse
.
Contents
do
begin
Add
(
'<form action="'
+
ARequest
.
URI
+
'" method="POST"'
)
;
Add
(
'<label for="user">User:</label>'
)
;
Add
(
'<input type="text" name="user" id="user" />'
)
;
Add
(
'<input type="submit" value="Check user" />'
)
;
Add
(
'</form>'
)
;
end
else
begin
with
SQLQuery1
do
begin
Close
(
)
;
Clear
(
)
;
SQL
.
Text
:
=
'SELECT username, password FROM user WHERE username='
+
QuotedStr
(
user
)
;
SQLConnection
.
Connected
:
=
True
;
SQLTransaction
.
Active
:
=
True
;
SQLQuery1
.
Active
:
=
True
;
Open
(
)
;
end
;
if
SQLQuery1
.
RecordCount
=
1
then
AResponse
.
Content
:
=
'user: '
+
user
+
'!'
else
AResponse
.
Content
:
=
'Bad login'
;
end
;
end
;
initialization
RegisterHTTPModule
(
'TFPWebModule1'
,
TFPWebModule1
)
;
HTTPRouter
.
RegisterRoute
(
'*'
,
@
FPWebModule1
.
DoStart
)
;
end
.
«
Last Edit: June 14, 2021, 10:58:59 pm by dasa2
»
Logged
iLya2IK
New Member
Posts: 36
Re: fpweb and sqlquery
«
Reply #1 on:
June 15, 2021, 04:25:23 pm »
I think, that you have not created an instance of the class and are trying to access it.
Look carefully - SQLQuery1 is not even exist
Logged
egsuh
Hero Member
Posts: 1296
Re: fpweb and sqlquery
«
Reply #2 on:
June 16, 2021, 04:04:13 am »
What does
TSQLQuery.Clear
do? Aren't you trying to
SQLQuery1.SQL.Clear;
?
Logged
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