If the script contains any syntax error (for example, a missing ")" character in an if statement), the script is not run. However, in this case, you have to use "Ex" functions (such as isInNetEx()), as mentioned in the following article:įor an example of myIpAddressEx implementation, see "myIpAddress" function returns incorrect result in Internet Explorer 9.
#Pac file bypass proxy for local addresses windows
If you want to use and handle IPv6 addresses, Internet Explorer supports them because Internet Explorer is included in every currently supported Windows version (and in WinHTTP since Windows Vista). Therefore, the parameters that are checked within the PAC file should be converted within the PAC before they are evaluated: host = host.toLowerCase() This is because WinHTTP passes the host and the url directly to the function. Internet Explorer itself converts the variables host and url into lowercase before the FindProxyForURL function is called. Therefore, an if clause that is uppercase will never become true, while other parameters use lowercase. The proxy script uses the JavaScript language.
#Pac file bypass proxy for local addresses code
The following code snippets have identical results, although shExpMatch runs faster: if (isInNet(hostIP, "95.53.0.0", "255.255.0.0")) Whenever possible, use the shExpMatch function instead of isInNet. Any additional error handling will be done by the proxy: if (hostIP=0)īecause we have the IP address of the host, the internal IP ranges have to be checked. When a non-existing host is passed to the function (for example, the user entered something wrong in the address bar), the result in host IP might be zero. In the following code snippet, the variable host IP contains the IP address for use in future checks: var hostIP The result is "true" for an IP and "false" otherwise. The result is then passed to the variable return. This code checks whether the variable host contains three numerals that are followed by a period and then followed by another numeral. You can use the following code to check whether the host is already in the IP address format: var isIpV4Addr = /^(\d+.)\d+$/ If the IP address is entered directly into the address bar, you do not have to resolve it again. If the IP address of the host belongs to the local intranet, regardless of the web server name, it should bypass the proxy in order to navigate directly. It returns the same result but adds an asterisk (*) as a wildcard character: if (shExpMatch(host, "*.")) The easiest way to determine such hosts is by using the dnsDomainis function: if (dnsDomainIs(host, "."))Īn alternative and faster method for the same result can be obtained by using ShExMatch(). Internally used DNS zones are typically routed directly. NetBIOS names (server names that contain no period) are used in the intranet only and are not routed through the proxy: if (isPlainHostName(host)) Therefore, you should avoid, or, at least, minimize the use of these functions. The isInNet(), isResolvable(), and dnsResolve() functions send queries to the DNS-subsystem.
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