lostecho/build-web-application-with-golang
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Update 04.4.md

Browse Source 
typographical errors and improved readability
This commit is contained in:
Jimmy99
2016-04-06 07:09:15 +02:00
committed by James Miranda
parent 9912e059cb
commit add89a9919
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
en/04.4.md
View File

@@ -1,6 +1,6 @@
# 4.4 Duplicate submissions
I don't know if you've ever seen some blogs or BBS' that have more than one posts that are exactly the same, but I can tell you that it's because users submitted duplicate post forms. There many things that can cause duplicate submissions; sometimes users just double click the submit button, or they want to modify some content after posting and press the back button. Other times it's the intentional actions of malicious users. It's easy to see how duplicate submissions can lead to many problems. Thus, we have to use effective means to prevent it.
I don't know if you've ever seen some blogs or BBS' that have more than one post that are exactly the same, but I can tell you that it's because users submitted duplicate post forms. There are many things that can cause duplicate submissions; sometimes users just double click the submit button, or they want to modify some content after posting and press the back button. In some cases it is by the intentional actions of malicious users. It's easy to see how duplicate submissions can lead to many problems. Thus, we have to use effective means to prevent it.
The solution is to add a hidden field with a unique token to your form, and to always check this token before processing the incoming data. Also, if you are using Ajax to submit a form, use JavaScript to disable the submit button once the form has been submitted.