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Tool Review:
Charles
Taffie Coler
History
 Charles 2.0 was released in 2005
 November 2006 – added JSON and SOAP support
 February 2007 – large responses allowed;

recording limits stripped
 March 2007 – public beta released
 March 2009 – TLS overhaul; experimental 64 bit

Windows support
 June 2012 – SSL signing works with Apple’s Dev
[1] 1
IDhttp://www.charlesproxy.com/
Comparison of similar tools
Charles

Wireshark





Simpler structure

 No outside knowledge

needed; very
 Samples only packets

from your app; ignores
broadcast and ARP
packets

More Control

 Steeper learning curve;

requires networking
knowledge
 Have to specifically

designate a port or filter
specific protocols
Sustainability, performance, pricing
 Sustainability – Charles has existed for 9 years with

several updates per year
 Performance – Charles is simplified in a nice way, I

only see HTTP data going through the app
 Negative: If feedback is encoded with specific data

types, Charles has trouble decoding packets
 Pricing – Charles is relatively expensive at $50 per

three licenses, but could pay off in the long run
Benefit/cost analysis
 A full-licensed version of Charles is $50 for a

lifetime of HTTP monitoring
 $26/hour was the lowest iOS developer wage, $40

is the average1
 One Charles license allows access to 3 computers.
 Pays for itself

[1] http://www.glassdoor.com/Salaries/ios-developer-salary-SRCH_KO0,13.htm
Compatibility
 Charles can run on several operating systems:
 Windows 32 bit
 Windows 64 bit
 Mac OSX
 Debian-based Linux distributions

 Charles is widely used for:
 iOS applications
 Android applications
 Web-based applications/pages
“Hello World”
Tutorial/training
Maintenance

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CS4561 Tool Review - Charles

  • 2. History  Charles 2.0 was released in 2005  November 2006 – added JSON and SOAP support  February 2007 – large responses allowed; recording limits stripped  March 2007 – public beta released  March 2009 – TLS overhaul; experimental 64 bit Windows support  June 2012 – SSL signing works with Apple’s Dev [1] 1 IDhttp://www.charlesproxy.com/
  • 3. Comparison of similar tools Charles Wireshark   Simpler structure  No outside knowledge needed; very  Samples only packets from your app; ignores broadcast and ARP packets More Control  Steeper learning curve; requires networking knowledge  Have to specifically designate a port or filter specific protocols
  • 4. Sustainability, performance, pricing  Sustainability – Charles has existed for 9 years with several updates per year  Performance – Charles is simplified in a nice way, I only see HTTP data going through the app  Negative: If feedback is encoded with specific data types, Charles has trouble decoding packets  Pricing – Charles is relatively expensive at $50 per three licenses, but could pay off in the long run
  • 5. Benefit/cost analysis  A full-licensed version of Charles is $50 for a lifetime of HTTP monitoring  $26/hour was the lowest iOS developer wage, $40 is the average1  One Charles license allows access to 3 computers.  Pays for itself [1] http://www.glassdoor.com/Salaries/ios-developer-salary-SRCH_KO0,13.htm
  • 6. Compatibility  Charles can run on several operating systems:  Windows 32 bit  Windows 64 bit  Mac OSX  Debian-based Linux distributions  Charles is widely used for:  iOS applications  Android applications  Web-based applications/pages