-
April 26th, 2013, 07:36 AM
#1
[RESOLVED] Extracting time stamps from pdf
Hi, I am trying to automatically extract all time stamps in a pdf file. These are typically in a line like:
when="2010-07-30T15:20:30+04:00"
For this I was thinking of using CStdioFile and the ReadString function. Somehow this doesn't work. My example code is below. Is this because pdf is not a true text file, because strings read can be longer than some max,...? What is my mistake or anyone have another quick way of reading the file and extracting the desired text between the brackets?
Code:
CStdioFile InputFile;
if (InputFile.Open(FileName,CFile::modeRead))
{
CString Line; CString ToFind; ToFind.Format("when");
while (InputFile.ReadString(Line))
{
if (Line.Find(ToFind)!=-1)
{
CString Item; AfxExtractSubString(Item,Line,0,'"');
AfxMessageBox(Item); // to be replaced with further processing
}
}
InputFile.Close();
}
Last edited by Simon666; April 26th, 2013 at 07:41 AM.
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
-
April 26th, 2013, 08:22 AM
#2
Re: Extracting time stamps from pdf
Well, open your .pdf file in the notepad and search for "when" text. Will it be found?
Victor Nijegorodov
-
April 26th, 2013, 08:43 AM
#3
Re: Extracting time stamps from pdf
Originally Posted by VictorN
Well, open your .pdf file in the notepad and search for "when" text. Will it be found?
Already did that. What if there are a gazillion instances? I want to automate it. I thought the ten lines above could do it. Obviously I was wrong.
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
-
April 26th, 2013, 09:19 AM
#4
Re: Extracting time stamps from pdf
Originally Posted by Simon666
Already did that. What if there are a gazillion instances? I want to automate it. I thought the ten lines above could do it. Obviously I was wrong.
Did what? Did you open your (it means the file ttat for sure contains the text you are looking for).pdf file in the notepad?
If you did it then what about the search result?
Victor Nijegorodov
-
April 26th, 2013, 09:29 AM
#5
Re: Extracting time stamps from pdf
I don't use CStdioFile, but in general, if you open a file up
in text mode and read while looping, you can come across
EOF early. Try opening in binary mode.
-
April 26th, 2013, 10:23 AM
#6
Re: Extracting time stamps from pdf
InputFile.Open(FileName,CFile::modeRead|CFile::typeBinary))
Let's me read a lot further but it still exits way before the actual end of the file.
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
-
April 26th, 2013, 10:36 AM
#7
Re: Extracting time stamps from pdf
Some things to consider:
1) I do not think that CString::Find() will work if their are embedded NULLS in the
string before the time stamp.
2) one "line" could contain multiple time stamps
-
April 26th, 2013, 10:55 AM
#8
Re: Extracting time stamps from pdf
I've looked at several .pdf files and none of them have when in them. The only time related stuff that I could find was /CreationDate eg. /CreationDate (D:20060208110100)
All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!
C++23 Compiler: Microsoft VS2022 (17.6.5)
-
April 26th, 2013, 11:34 AM
#9
Re: Extracting time stamps from pdf
Originally Posted by 2kaud
I've looked at several .pdf files and none of them have when in them. The only time related stuff that I could find was /CreationDate eg. /CreationDate (D:20060208110100)
Yeah, It was the first thing I've done before posting my first answer:
Originally Posted by VictorN
Well, open your .pdf file in the notepad and search for "when" text. Will it be found?
Just because I coudn't find "when" (either as ANSI or UNICODE) in some of my .pdf files!
However, OP seems to ignore my opnion...
Victor Nijegorodov
-
April 26th, 2013, 01:40 PM
#10
Re: Extracting time stamps from pdf
Originally Posted by Philip Nicoletti
Some things to consider:
1) I do not think that CString::Find() will work if their are embedded NULLS in the
string before the time stamp.
2) one "line" could contain multiple time stamps
1) I checked that doesn't occur.
2) Same.
Originally Posted by 2kaud
I've looked at several .pdf files and none of them have when in them. The only time related stuff that I could find was /CreationDate eg. /CreationDate (D:20060208110100)
It is metadata of pictures from Adobe Photoshop.
Originally Posted by VictorN
Just because I coudn't find "when" (either as ANSI or UNICODE) in some of my .pdf files!
However, OP seems to ignore my opnion...
Victor, I did not ignore you. I addressed that issue specifically. There are about 80 entries per pdf and 10 pdf's. I didn't want to do roughly all 800 of them manually when roughly 10 lines of code could do but by now the time spent will be about equal.
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
-
April 26th, 2013, 01:46 PM
#11
Re: Extracting time stamps from pdf
Originally Posted by Simon666
Victor, I did not ignore you. I addressed that issue specifically. There are about 80 entries per pdf and 10 pdf's. I didn't want to do roughly all 800 of them manually when roughly 10 lines of code could do but by now the time spent will be about equal.
So could you find in notepad at least one of these "80 entries per pdf" or not?
Victor Nijegorodov
-
April 26th, 2013, 01:52 PM
#12
Re: Extracting time stamps from pdf
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
-
April 26th, 2013, 02:22 PM
#13
Re: Extracting time stamps from pdf
What "why"?
Are they found as ANSI or UNICODE?
Is your buils ANSI or UNICODE?
Victor Nijegorodov
-
April 26th, 2013, 02:33 PM
#14
Re: Extracting time stamps from pdf
Anyway, I got an idea, I might use GetPosition and check if it is anywhere near the end of the file, if not just call ReadString again in a while loop. I'll first try that.
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞۞
-
April 26th, 2013, 03:04 PM
#15
Re: Extracting time stamps from pdf
Originally Posted by Simon666
Anyway, I got an idea, I might use GetPosition and check if it is anywhere near the end of the file, if not just call ReadString again in a while loop. I'll first try that.
Or you could respond to Victor's questions.
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
|
Click Here to Expand Forum to Full Width
|