C#: Solving Fiverr captcha?
- Thread starter kytro360
- Start date
kytro360
Power Member
- Jan 12, 2010
- 708
- 737
Its not a captcha thats the thing.
Its stuff like: 7 + 2 =
...but its not in an image but spelled out in a string or regular text, thats why its tricky.
theMagicNumber
Regular Member
- May 13, 2010
- 347
- 197
I cannot see what the problem is. This is one of the worst spam protections i have ever seen.
I think they only use sum(+), so get the numbers, parse them to integers(int.Parse(number)) and sum them.
If it is more complex and you don't want to write your own math eval class. You can use this one at codeplex:
http://ncalc.codeplex.com/
I think they only use sum(+), so get the numbers, parse them to integers(int.Parse(number)) and sum them.
If it is more complex and you don't want to write your own math eval class. You can use this one at codeplex:
http://ncalc.codeplex.com/
Code:
NCalc.Expression expr = new NCalc.Expression("2+2");
string result = expr.Evaluate().ToString(); //CAPTCHA Solvedsomething77
Registered Member
- Jan 6, 2010
- 73
- 10
For maths sums, you do not need external libraries, you can use the system.data.datatable
Code:
string result = new System.Data.DataTable().Compute(sum, null).ToString();theMagicNumber
Regular Member
- May 13, 2010
- 347
- 197
Yes you are correct. I won't use any third party library for a simple math operation like this, however i won't use DataTable either, you are instancing a DataTable class with all of its variables, properties and methods, which have no relevance to the Compute method. It is the same as killing a mosquito with a cannon.
something77
Registered Member
- Jan 6, 2010
- 73
- 10
But the mosquito is killed right? lol
But on a more serious note you are quite right
omnipotent
Newbie
- Jun 7, 2012
- 23
- 4
aren't the numbers sometimes displayed as pictures? if so, then you still need to have some pattern recognition for them