URL truncation technique using pointers skillfully

When using URL truncation, we generally want to get site, port, and path from the URL. This is the most memory-saving method is to use memory skillfully.

Give an example. A Url:http://write.blog.csdn.net/postedit?ref=toolbar

By passing in a URL, we return the "/" value of port and path directly to path (pointer), get path and write "\" as "."

Then the ":" after the digit to the port because the previous \ has been written, so here can directly get 8080. Again: Write A.

Finally, direct transfer of URL+7 to the site will be able to get write.blog.csdn.net

At this point, no new memory was created to truncate the URL directly.

Specifically implemented as follows:

int X_parse_url (const char *input, Char *site, Char *port, char *path) 00766 {00767 char Tmp[gl_max_url_
LEN];
00768 char *pin = tmp;
00769 Char *p, *q;
00770 char *p_query = NULL; 00771 if (strlen (input) >= Gl_max_url_len) 00772 {00773 write_log (gl_log_debug, "X_parse_url:url is T
OO Long ");
00774 return 0;
00775} 00776 strcpy (tmp, input);
00777 X_delete_inter (TMP); 00778 if (strncasecmp (PIN, "http://", 7) = = 0) 00779 {pin + 7;} 00780//get path 00781 p = STRCHR (PIN,
'/');
00782 p_query = STRCHR (pin, '? '); 00783 if (null = p) 00784 {00785 p = p_query; 00786} 00787 if ((null!= p_query) && (p_             Query <= p) 00788 {00789 if (path!= NULL) 00790 {00791 path[0] = '; 00792 if (strlen (p_query) < gl_max_path_len-1) 00793 {00794 strncpy (PATH, "/", 2);
00795 strcat (path, p_query); 
00796} 00797 Else 00798 {return 0;} 00799} 00800 *p_query = '; 00801} 00802 Else 00803 {00804 if (P!= null) 00805 {00806 if (path!= null) 0                 0807 {00808 Path[0] = ' I '; 00809 if (strlen (p) < Gl_max_path_len) 00810 {strcpy (path, p);} 00811 else 00812 {return 0;} 00813} 008
*p = ' the ";                 00815} 00816 Else 00817 {00818 if (path!= NULL) 00819 {00820
strcpy (Path, "/");
00821} 00822} 00823} 00824 q = STRCHR (PIN, ': ');             00825//get Port 00826 if (q!= null) 00827 {00828 if (port!= null) 00829 {00830
Port[0] = ' the '; 00831 if (strlen (q) < Gl_max_port_len && ATOI (q + 1) > 0) 00832 {00833 strcpy (port, q + 1); 00834} 00835 Else
00836 {return 0;} 00837} 00838 *q = ';      00839} 00840 Else 00841 {00842 if (port!= NULL) 00843 {port[0] = ' I '; 00844} 00845         Check if the default port 00846 if (port!= NULL) && (Port, "80", 3)) = 0) 00847 {00848
Port[0] = 0; 00849} 00850//get site 00851 if (site!= NULL) 00852 {00853 site[0] = ' I '; 00854 if (p         In[0]!= ' && strlen (PIN) < Gl_max_site_len) 00855 {00856 strcpy (SITE, pin); 00857 } 00858 Else 00859 {00860 Write_log (gl_log_debug, "x_parse_url:site name too long or EMP
Ty url[%s] ", pin);
00861 return 0;
00862} 00863} 00864 return 1; 00865}