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• 关于
• 用法
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关于

An output stream is used to write data to a resource defined with a maxon::Url . maxon::OutputStreamInterface is based on maxon::BaseStreamInterface .

用法

maxon::BaseStreamInterface provides these simple functions:

• maxon::OutputStreamInterface::Write() : Writes the given number of bytes from the given buffer into the stream.
• maxon::OutputStreamInterface::Flush() : Flushes the output stream and forces any buffered output bytes to be written.

注意

To append to the end of a file use the flags maxon::OPENSTREAMFLAGS::WRITE_DONT_TRUNCATE and maxon::OPENSTREAMFLAGS::SEEK_TO_END .

// construct file URL const maxon::Url url = (targetFolder + maxon::Url ( "sometext.txt" _s)) iferr_return ;

// only proceed if file does not exist yet if (url.IoDetect() == maxon::IODETECT::NONEXISTENT ) { // define text const maxon::String data { "Hello World!" }; const maxon::BaseArray<maxon::Char> memory = data.GetCString() iferr_return ;

// write to file const maxon::OutputStreamRef stream = url.OpenOutputStream() iferr_return ; stream.Write(memory) iferr_return ; stream.Close() iferr_return ; }

// This example loads a file from the web and saves it to the local file system.

// check if the given URL references a file on the web const maxon::UrlScheme scheme = webFile.GetScheme(); const maxon::Bool isHTTP = scheme == maxon::URLSCHEME_HTTP ; const maxon::Bool isHTTPS = scheme == maxon::URLSCHEME_HTTPS ;