What is the maximum URL length you can pass to the Wininet function, HttpOpenRequest?

Question

What is the maximum URL length you can pass to the Wininet function, HttpOpenRequest?

Answer 1

There are some max length consts in WinInet.h:

...
//
// maximum field lengths (arbitrary)
//

#define INTERNET_MAX_HOST_NAME_LENGTH   256
#define INTERNET_MAX_USER_NAME_LENGTH   128
#define INTERNET_MAX_PASSWORD_LENGTH    128
#define INTERNET_MAX_PORT_NUMBER_LENGTH 5           // INTERNET_PORT is unsigned short
#define INTERNET_MAX_PORT_NUMBER_VALUE  65535       // maximum unsigned short value
#define INTERNET_MAX_PATH_LENGTH        2048
#define INTERNET_MAX_SCHEME_LENGTH      32          // longest protocol name length
#define INTERNET_MAX_URL_LENGTH         (INTERNET_MAX_SCHEME_LENGTH \
                                        + sizeof("://") \
                                        + INTERNET_MAX_PATH_LENGTH)
...