73 lines
2.0 KiB
Go
73 lines
2.0 KiB
Go
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package ieproxy
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import (
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"strings"
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"syscall"
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"unsafe"
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)
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func (psc *ProxyScriptConf) findProxyForURL(URL string) string {
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if !psc.Active {
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return ""
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}
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proxy, _ := getProxyForURL(psc.PreConfiguredURL, URL)
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i := strings.Index(proxy, ";")
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if i >= 0 {
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return proxy[:i]
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}
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return proxy
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}
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func getProxyForURL(pacfileURL, URL string) (string, error) {
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pacfileURLPtr, err := syscall.UTF16PtrFromString(pacfileURL)
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if err != nil {
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return "", err
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}
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URLPtr, err := syscall.UTF16PtrFromString(URL)
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if err != nil {
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return "", err
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}
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handle, _, err := winHttpOpen.Call(0, 0, 0, 0, 0)
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if handle == 0 {
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return "", err
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}
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defer winHttpCloseHandle.Call(handle)
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dwFlags := fWINHTTP_AUTOPROXY_CONFIG_URL
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dwAutoDetectFlags := autoDetectFlag(0)
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pfURLptr := pacfileURLPtr
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if pacfileURL == "" {
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dwFlags = fWINHTTP_AUTOPROXY_AUTO_DETECT
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dwAutoDetectFlags = fWINHTTP_AUTO_DETECT_TYPE_DNS_A | fWINHTTP_AUTO_DETECT_TYPE_DHCP
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pfURLptr = nil
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}
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options := tWINHTTP_AUTOPROXY_OPTIONS{
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dwFlags: dwFlags, // adding cache might cause issues: https://github.com/mattn/go-ieproxy/issues/6
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dwAutoDetectFlags: dwAutoDetectFlags,
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lpszAutoConfigUrl: pfURLptr,
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lpvReserved: nil,
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dwReserved: 0,
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fAutoLogonIfChallenged: true, // may not be optimal https://msdn.microsoft.com/en-us/library/windows/desktop/aa383153(v=vs.85).aspx
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} // lpszProxyBypass isn't used as this only executes in cases where there (may) be a pac file (autodetect can fail), where lpszProxyBypass couldn't be returned.
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// in the case that autodetect fails and no pre-specified pacfile is present, no proxy is returned.
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info := new(tWINHTTP_PROXY_INFO)
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ret, _, err := winHttpGetProxyForURL.Call(
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handle,
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uintptr(unsafe.Pointer(URLPtr)),
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uintptr(unsafe.Pointer(&options)),
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uintptr(unsafe.Pointer(info)),
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)
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if ret > 0 {
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err = nil
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}
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defer globalFreeWrapper(info.lpszProxyBypass)
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defer globalFreeWrapper(info.lpszProxy)
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return StringFromUTF16Ptr(info.lpszProxy), err
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}
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