core/Request.php
public static function setContentType($type, $encoding = 'utf-8')
    {
        if (strpos($type, '/') === false) {
            $mime_types = [
                'txt' => 'text/plain',
                'htm' => 'text/html',
                'html' => 'text/html',
                'php' => 'text/html',
                'css' => 'text/css',
                'js' => 'application/javascript',
                'json' => 'text/json',
                'xml' => 'application/xml',
                'swf' => 'application/x-shockwave-flash',
                'flv' => 'video/x-flv',
                // images
                'png' => 'image/png',
                'jpe' => 'image/jpeg',
                'jpeg' => 'image/jpeg',
                'jpg' => 'image/jpeg',
                'gif' => 'image/gif',
                'bmp' => 'image/bmp',
                'ico' => 'image/vnd.microsoft.icon',
                'tiff' => 'image/tiff',
                'tif' => 'image/tiff',
                'svg' => 'image/svg+xml',
                'svgz' => 'image/svg+xml',
                // archives
                'zip' => 'application/zip',
                'rar' => 'application/x-rar-compressed',
                'exe' => 'application/x-msdownload',
                'msi' => 'application/x-msdownload',
                'cab' => 'application/vnd.ms-cab-compressed',
                // audio/video
                'mp3' => 'audio/mpeg',
                'qt' => 'video/quicktime',
                'mov' => 'video/quicktime',
                // adobe
                'pdf' => 'application/pdf',
                'psd' => 'image/vnd.adobe.photoshop',
                'ai' => 'application/postscript',
                'eps' => 'application/postscript',
                'ps' => 'application/postscript',
                // ms office
                'doc' => 'application/msword',
                'rtf' => 'application/rtf',
                'xls' => 'application/vnd.ms-excel',
                'ppt' => 'application/vnd.ms-powerpoint',
                // open office
                'odt' => 'application/vnd.oasis.opendocument.text',
                'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
            ];
            $type = isset($mime_types[$type]) ? $mime_types[$type] : 'application/octet-stream';
        }
        $contentType = $type . '; charset=' . $encoding;
        self::setHeader('Content-Type', $contentType);
    }
public static function setContentType($type, $encoding = 'utf-8')
    {
        if (strpos($type, '/') === false) {
            $mime_types = [
                'txt' => 'text/plain',
                'htm' => 'text/html',
                'html' => 'text/html',
                'php' => 'text/html',
                'css' => 'text/css',
                'js' => 'application/javascript',
                'json' => 'text/json',
                'xml' => 'application/xml',
                'swf' => 'application/x-shockwave-flash',
                'flv' => 'video/x-flv',
                // images
                'png' => 'image/png',
                'jpe' => 'image/jpeg',
                'jpeg' => 'image/jpeg',
                'jpg' => 'image/jpeg',
                'gif' => 'image/gif',
                'bmp' => 'image/bmp',
                'ico' => 'image/vnd.microsoft.icon',
                'tiff' => 'image/tiff',
                'tif' => 'image/tiff',
                'svg' => 'image/svg+xml',
                'svgz' => 'image/svg+xml',
                // archives
                'zip' => 'application/zip',
                'rar' => 'application/x-rar-compressed',
                'exe' => 'application/x-msdownload',
                'msi' => 'application/x-msdownload',
                'cab' => 'application/vnd.ms-cab-compressed',
                // audio/video
                'mp3' => 'audio/mpeg',
                'qt' => 'video/quicktime',
                'mov' => 'video/quicktime',
                // adobe
                'pdf' => 'application/pdf',
                'psd' => 'image/vnd.adobe.photoshop',
                'ai' => 'application/postscript',
                'eps' => 'application/postscript',
                'ps' => 'application/postscript',
                // ms office
                'doc' => 'application/msword',
                'rtf' => 'application/rtf',
                'xls' => 'application/vnd.ms-excel',
                'ppt' => 'application/vnd.ms-powerpoint',
                // open office
                'odt' => 'application/vnd.oasis.opendocument.text',
                'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
            ];
            $type = isset($mime_types[$type]) ? $mime_types[$type] : 'application/octet-stream';
        }
        $contentType = $type . '; charset=' . $encoding;
        self::setHeader('Content-Type', $contentType);
    }
设置内容类型
@param $type
@param string $encoding