Apple | Online Assessment | Analyze Log Files
Anonymous User
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AppleInterview

One of the questions in online assessment:

Given a text file of an http requests log, list the number of GET requests with response code 200
Output should be directed to a file as described in the below.

The format of the log file, a text file with a .txt extension, follows.
Each line contains a single log record with the following columns (in order):

  1. The hostname of the host making the request.
  2. Missing column value denoted by hyphen "-"
  3. Missing column value denoted by hyphen "-"
  4. A timestamp enclosed in square brackets following the format [DD/mm/YYY:HH:MM:SS-0400].
  5. The request, enclosed in quotes(eg, "GET/images/NASA-logosmall.gif HTTP/1.0").
  6. The HTTP response code.
  7. The total number of bytes sent in the response.

Function Description: Your function must create a unique list of hostnames with GET requests + response code of 200 and output to a file named "records_filename" where filename is replaced with input filename.
Each hostname should be followed by a space then the number of requests and a newline.
The filenames can appear in any order in output file

Constraints:

The log file has a maximum pf 200000 lines of records

Sample Input 0:
 host_access_log_00.txt
 
 Sample Output 0:
 
 **File Name:**
 records_host_access_log_00
 
** Content Of File:**
 unicomp6.unicompt.net 4
 burger.letters.com 1
 d104.aa.net 1

 
 Explanation 0:
 The log file hosts_access_log_00.txt contains the following log records;
 unicomp6.unicompt.net - - [01/AUG/2005:00:00:06 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 200 3985 
 burger.letters.com - - [01/AUG/2005:00:00:11 - 0400] "GET /shuttle/countdown/liftoff.html HTTP/1.0" 304 0
 burger.letters.com - - [01/AUG/2005:00:00:12 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 304 0
 burger.letters.com - - [01/AUG/2005:00:00:12 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 200 0
 d104.aa.net - - [01/AUG/2005:00:00:13 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 200 3985 
 unicomp6.unicompt.net - - [01/AUG/2005:00:00:14 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 200 40310 
 unicomp6.unicompt.net - - [01/AUG/2005:00:00:14 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 200 786 
 unicomp6.unicompt.net - - [01/AUG/2005:00:00:14 - 0400] "GET /shuttle/countdown/ HTTP/1.0" 200 1204 
 d104.aa.net - - [01/AUG/2005:00:00:15 - 0400] "POST /shuttle/countdown/ HTTP/1.0" 200 40310 
 d104.aa.net - - [01/AUG/2005:00:00:15 - 0400] "POST /images/NASA-logosmall.gif HTTP/1.0" 200 786

Language preference (but not a restriction) C++

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