为什么Qt不理会http_proxy环境变量？

[Cong Wang]

如题 必须手动指定代理

[Cong Wang]

找到问题所在了
http://doc.trolltech.com/4.5/qnetworkproxyfactory.html

QList<QNetworkProxy> QNetworkProxyFactory::systemProxyForQuery ( const QNetworkProxyQuery & query = QNetworkProxyQuery() )   [static]

This function examines takes the query request, query, examines the details of the type of socket or request and returns a list of QNetworkProxy objects that indicate the proxy servers to be used, in order of preference.

This function can be used to determine the platform-specific proxy settings. This function will use the libraries provided by the operating system to determine the proxy for a given connection, if such libraries exist. If they don't, this function will just return a QNetworkProxy of type QNetworkProxy::NoProxy.

On Windows, this function will use the WinHTTP DLL functions. Despite its name, Microsoft suggests using it for all applications that require network connections, not just HTTP. This will respect the proxy settings set on the registry with the proxycfg.exe tool. If those settings are not found, this function will attempt to obtain Internet Explorer's settings and use them.

On MacOS X, this function will obtain the proxy settings using the SystemConfiguration framework from Apple. It will apply the FTP, HTTP and HTTPS proxy configurations for queries that contain the protocol tag "ftp", "http" and "https", respectively. If the SOCKS proxy is enabled in that configuration, this function will use the SOCKS server for all queries. If SOCKS isn't enabled, it will use the HTTPS proxy for all TcpSocket and UrlRequest queries.

On other systems, there is no standardised method of obtaining the system proxy configuration. This function may be improved in future versions to support those systems.

[Cong Wang]

目前的实现

QString var(getenv("http_proxy"));

QRegExp regex("(http://)?(.*):(\\d*)/?");

int pos = regex.indexIn(var);

if(pos > -1){

QString host = regex.cap(2);

int port = regex.cap(3).toInt();

QNetworkProxy proxy(QNetworkProxy::HttpProxy, host, port);

QNetworkProxy::setApplicationProxy(proxy);

}

2009/7/21 Cong Wang <silw...@gmail.com>