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Form help - HTML and Shell script

Scruffy90
By Scruffy90
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I am taking a Unix class and am completely lost. I have no clue how to even go about starting this.

 

My professor wants us to create a web form using HTML and Shell script. The form has to display a random image (either saved on the server or from a url using the curl command and shuffle).The user is asked to type the word that is displayed on the image and submit the form. If the user input matches the word, than it displays a message stating that their input was correct, otherwise it displays an error message.

 

How do I go about getting this started? Thanks

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So your professor wants you to build a captcha challenge? That's what I understand from it...

Using Shell Script to serve a random image sounds weird to me. I would rather do it with a server side scripting language like PHP.

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33 minutes ago, Limecat86 said:

So your professor wants you to build a captcha challenge? That's what I understand from it...

Using Shell Script to serve a random image sounds weird to me. I would rather do it with a server side scripting language like PHP.

That is correct. He wants everything done in HTML and Shell script. Would it have been anything other than the shell script, it wouldn't be an issue. I just don't know how to grab info from the html form and process and output it using the shell script.

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2 minutes ago, prolemur said:

Some quick googling came up with this guide: http://www.unix.com/302404675-post7.html

 

Seems like an unorthodox way about completing such a task though :) Good luck!

This is a good start. Thanks!

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49 minutes ago, Limecat86 said:

So your professor wants you to build a captcha challenge? That's what I understand from it...

Using Shell Script to serve a random image sounds weird to me. I would rather do it with a server side scripting language like PHP.

15 minutes ago, Scruffy90 said:

That is correct. He wants everything done in HTML and Shell script. Would it have been anything other than the shell script, it wouldn't be an issue. I just don't know how to grab info from the html form and process and output it using the shell script.

Unless you can build one that is more secure than the already existing Google ReCaptchV2 script, I don't see any real-world point to writing your own.

However, I can certainly understand your professors' points in having you write your own implementation of a Captcha for learning purposes.

 

I think what he's asking you to do is write a PHP script (using PHP to curl a url and HTML to make it pretty) to display an image to the user.

Without a database (or an array, at least) storing the correct values for each Captcha image, I don't see how you'd verify correct submissions from the user.

Is your professor providing these images?

Is he also giving you a list of correct values?

Or are you expected to come up with those values on your own? Manually? Or algorithmically?

 

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17 minutes ago, kirashi said:

Unless you can build one that is more secure than the already existing Google ReCaptchV2 script, I don't see any real-world point to writing your own.

However, I can certainly understand your professors' points in having you write your own implementation of a Captcha for learning purposes.

 

I think what he's asking you to do is write a PHP script (using PHP to curl a url and HTML to make it pretty) to display an image to the user.

Without a database (or an array, at least) storing the correct values for each Captcha image, I don't see how you'd verify correct submissions from the user.

Is your professor providing these images?

Is he also giving you a list of correct values?

Or are you expected to come up with those values on your own? Manually? Or algorithmically?

 

There's no real world point to it. Mostly just for learning. He explicitly wants everything in shell script. I don't know why, he told us to avoid using perl, javascript, etc. He hasn't given us anything to go on other than a basic HTML form template.

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