csv - Validation of TSV file in Java -

-

I create a web application to upload a tsv file

  1. JDK -> 1.4 " -> 1
  2. Resin -> 3.0.9

TSV file should be" \ t "," \ n "," \ R is parsed with "

validation.

1. What is the file name with the naming convention?

2. Is this a TSV file?

How should I recognize a picture or office document similar to TSV?

It depends on your definition, a TSV file.

Do all have the same columns? Or is it possible to leave the last empty pillars?

If they all have the same columns, then you can first recognize it if it fails, then you know that the file is not valid.

Do they have a top row? If so, you can use the answer to the above question and to parse the file.

What is the permission to quote? If so, is it allowed to have tabs on carriage return or quotation marks? (Does not necessarily help in verification, but you will have to think about parsing)

Is your text strictly a lesson? You can test for non-printable characters and reject it on that basis. Then take caution on the character encoding (UTF vs ASCII, etc.) used for the file. It can be placed in a code that parses from flat files to the data structure (for example, the map list) first.

Drilling yourself into the file, if this format is the default or type some data is known that you can create a secondary parser to validate this data (date, timestamp or other fixed format string) . This second level can be done when you get more information about the material and processing the data from the above structure.

All the above are empirical analyzes, as if you should expect false positive methods, though false should not be negative if you choose the rules for which your entry files are necessary. Therefore, with the processing stack everyone is expected to face the invalid data and be ready to invalidate the complete file input, in other words it never assumes that the test is fully assured that the file is correct.

I hope this helps.


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more