问题
I'm using Filetransfer API in a phonegap app.
Now, I'm finding impossible to get around this, and couldn't find a solution.
I have used both .toURL() and .fullPath, but both return the same.
If I use:
window.resolveLocalFileSystemURL(imageURI, function(entry){
console.log(entry.toURL()+' -- ' +entry.fullPath);
});
I get:
content://com.android.providers.media.documents/document/image%3A8055 -- /com.android.providers.media.documents/document/image%3A8055
Is there a simple way to get the extension or even the full name of the file captured by the phone?
Thanks for the input.
回答1:
This answer is a "workaround" only if you cannot get the file extension from your version of Cordova API.
Since you cannot really extract much information about a string URI, what I did was scan through other objects provided by the Cordova then I found the File object which contains at least what I needed, the MIME type.
From the client side code you need to do this:
// After you get the URI of the file
window.resolveLocalFileSystemURL(fileUri, function(fileEntry) {
fileEntry.file(function(file) {
uploadFile(fileEntry, file.type);
});
});
// Code snippet for uploadFile function
function uploadFile(fileEntry, fileType) {
var serverUrl = DOMAIN + 'api/upload-file.php';
var options = new FileUploadOptions();
options.fileKey = "file";
options.fileName = fileEntry.name;
options.mimeType = fileType;
options.chunkedMode = false;
// More codes are omitted for brevity
}
If you're using PHP as a server side script, you can extract the information you have injected before, using $_FILES['file'], which resolves to the file you uploaded and $_FILES['file']['type'], which would resolve to a MIME type of that file.
Now for mapping it into an extension name, you can use the code below:
function mimeToExt($mime) {
$extensions = array(
'hqx' => array('application/mac-binhex40', 'application/mac-binhex', 'application/x-binhex40', 'application/x-mac-binhex40'),
'cpt' => 'application/mac-compactpro',
'csv' => array('text/x-comma-separated-values', 'text/comma-separated-values', 'application/octet-stream', 'application/vnd.ms-excel', 'application/x-csv', 'text/x-csv', 'text/csv', 'application/csv', 'application/excel', 'application/vnd.msexcel', 'text/plain'),
'bin' => array('application/macbinary', 'application/mac-binary', 'application/octet-stream', 'application/x-binary', 'application/x-macbinary'),
'dms' => 'application/octet-stream',
'lha' => 'application/octet-stream',
'lzh' => 'application/octet-stream',
'exe' => array('application/octet-stream', 'application/x-msdownload'),
'class' => 'application/octet-stream',
'psd' => array('application/x-photoshop', 'image/vnd.adobe.photoshop'),
'so' => 'application/octet-stream',
'sea' => 'application/octet-stream',
'dll' => 'application/octet-stream',
'oda' => 'application/oda',
'pdf' => array('application/pdf', 'application/force-download', 'application/x-download', 'binary/octet-stream'),
'ai' => array('application/pdf', 'application/postscript'),
'eps' => 'application/postscript',
'ps' => 'application/postscript',
'smi' => 'application/smil',
'smil' => 'application/smil',
'mif' => 'application/vnd.mif',
'xls' => array('application/vnd.ms-excel', 'application/msexcel', 'application/x-msexcel', 'application/x-ms-excel', 'application/x-excel', 'application/x-dos_ms_excel', 'application/xls', 'application/x-xls', 'application/excel', 'application/download', 'application/vnd.ms-office', 'application/msword'),
'ppt' => array('application/powerpoint', 'application/vnd.ms-powerpoint', 'application/vnd.ms-office', 'application/msword'),
'pptx' => array('application/vnd.openxmlformats-officedocument.presentationml.presentation', 'application/x-zip', 'application/zip'),
'wbxml' => 'application/wbxml',
'wmlc' => 'application/wmlc',
'dcr' => 'application/x-director',
'dir' => 'application/x-director',
'dxr' => 'application/x-director',
'dvi' => 'application/x-dvi',
'gtar' => 'application/x-gtar',
'gz' => 'application/x-gzip',
'gzip' => 'application/x-gzip',
'php' => array('application/x-httpd-php', 'application/php', 'application/x-php', 'text/php', 'text/x-php', 'application/x-httpd-php-source'),
'php4' => 'application/x-httpd-php',
'php3' => 'application/x-httpd-php',
'phtml' => 'application/x-httpd-php',
'phps' => 'application/x-httpd-php-source',
'js' => array('application/x-javascript', 'text/plain'),
'swf' => 'application/x-shockwave-flash',
'sit' => 'application/x-stuffit',
'tar' => 'application/x-tar',
'tgz' => array('application/x-tar', 'application/x-gzip-compressed'),
'z' => 'application/x-compress',
'xhtml' => 'application/xhtml+xml',
'xht' => 'application/xhtml+xml',
'zip' => array('application/x-zip', 'application/zip', 'application/x-zip-compressed', 'application/s-compressed', 'multipart/x-zip'),
'rar' => array('application/x-rar', 'application/rar', 'application/x-rar-compressed'),
'mid' => 'audio/midi',
'midi' => 'audio/midi',
'mpga' => 'audio/mpeg',
'mp2' => 'audio/mpeg',
'mp3' => array('audio/mpeg', 'audio/mpg', 'audio/mpeg3', 'audio/mp3'),
'aif' => array('audio/x-aiff', 'audio/aiff'),
'aiff' => array('audio/x-aiff', 'audio/aiff'),
'aifc' => 'audio/x-aiff',
'ram' => 'audio/x-pn-realaudio',
'rm' => 'audio/x-pn-realaudio',
'rpm' => 'audio/x-pn-realaudio-plugin',
'ra' => 'audio/x-realaudio',
'rv' => 'video/vnd.rn-realvideo',
'wav' => array('audio/x-wav', 'audio/wave', 'audio/wav'),
'bmp' => array('image/bmp', 'image/x-bmp', 'image/x-bitmap', 'image/x-xbitmap', 'image/x-win-bitmap', 'image/x-windows-bmp', 'image/ms-bmp', 'image/x-ms-bmp', 'application/bmp', 'application/x-bmp', 'application/x-win-bitmap'),
'gif' => 'image/gif',
'jpeg' => array('image/jpeg', 'image/pjpeg'),
'jpg' => array('image/jpeg', 'image/pjpeg'),
'jpe' => array('image/jpeg', 'image/pjpeg'),
'jp2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'j2k' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'jpf' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'jpg2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'jpx' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'jpm' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'mj2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'mjp2' => array('image/jp2', 'video/mj2', 'image/jpx', 'image/jpm'),
'png' => array('image/png', 'image/x-png'),
'tiff' => 'image/tiff',
'tif' => 'image/tiff',
'css' => array('text/css', 'text/plain'),
'html' => array('text/html', 'text/plain'),
'htm' => array('text/html', 'text/plain'),
'shtml' => array('text/html', 'text/plain'),
'txt' => 'text/plain',
'text' => 'text/plain',
'log' => array('text/plain', 'text/x-log'),
'rtx' => 'text/richtext',
'rtf' => 'text/rtf',
'xml' => array('application/xml', 'text/xml', 'text/plain'),
'xsl' => array('application/xml', 'text/xsl', 'text/xml'),
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'mpe' => 'video/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
'avi' => array('video/x-msvideo', 'video/msvideo', 'video/avi', 'application/x-troff-msvideo'),
'movie' => 'video/x-sgi-movie',
'doc' => array('application/msword', 'application/vnd.ms-office'),
'docx' => array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip', 'application/msword', 'application/x-zip'),
'dot' => array('application/msword', 'application/vnd.ms-office'),
'dotx' => array('application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'application/zip', 'application/msword'),
'xlsx' => array('application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'application/zip', 'application/vnd.ms-excel', 'application/msword', 'application/x-zip'),
'word' => array('application/msword', 'application/octet-stream'),
'xl' => 'application/excel',
'eml' => 'message/rfc822',
'json' => array('application/json', 'text/json'),
'pem' => array('application/x-x509-user-cert', 'application/x-pem-file', 'application/octet-stream'),
'p10' => array('application/x-pkcs10', 'application/pkcs10'),
'p12' => 'application/x-pkcs12',
'p7a' => 'application/x-pkcs7-signature',
'p7c' => array('application/pkcs7-mime', 'application/x-pkcs7-mime'),
'p7m' => array('application/pkcs7-mime', 'application/x-pkcs7-mime'),
'p7r' => 'application/x-pkcs7-certreqresp',
'p7s' => 'application/pkcs7-signature',
'crt' => array('application/x-x509-ca-cert', 'application/x-x509-user-cert', 'application/pkix-cert'),
'crl' => array('application/pkix-crl', 'application/pkcs-crl'),
'der' => 'application/x-x509-ca-cert',
'kdb' => 'application/octet-stream',
'pgp' => 'application/pgp',
'gpg' => 'application/gpg-keys',
'sst' => 'application/octet-stream',
'csr' => 'application/octet-stream',
'rsa' => 'application/x-pkcs7',
'cer' => array('application/pkix-cert', 'application/x-x509-ca-cert'),
'3g2' => 'video/3gpp2',
'3gp' => array('video/3gp', 'video/3gpp'),
'mp4' => 'video/mp4',
'm4a' => 'audio/x-m4a',
'f4v' => array('video/mp4', 'video/x-f4v'),
'flv' => 'video/x-flv',
'webm' => 'video/webm',
'aac' => 'audio/x-acc',
'm4u' => 'application/vnd.mpegurl',
'm3u' => 'text/plain',
'xspf' => 'application/xspf+xml',
'vlc' => 'application/videolan',
'wmv' => array('video/x-ms-wmv', 'video/x-ms-asf'),
'au' => 'audio/x-au',
'ac3' => 'audio/ac3',
'flac' => 'audio/x-flac',
'ogg' => array('audio/ogg', 'video/ogg', 'application/ogg'),
'kmz' => array('application/vnd.google-earth.kmz', 'application/zip', 'application/x-zip'),
'kml' => array('application/vnd.google-earth.kml+xml', 'application/xml', 'text/xml'),
'ics' => 'text/calendar',
'ical' => 'text/calendar',
'zsh' => 'text/x-scriptzsh',
'7zip' => array('application/x-compressed', 'application/x-zip-compressed', 'application/zip', 'multipart/x-zip'),
'cdr' => array('application/cdr', 'application/coreldraw', 'application/x-cdr', 'application/x-coreldraw', 'image/cdr', 'image/x-cdr', 'zz-application/zz-winassoc-cdr'),
'wma' => array('audio/x-ms-wma', 'video/x-ms-asf'),
'jar' => array('application/java-archive', 'application/x-java-application', 'application/x-jar', 'application/x-compressed'),
'svg' => array('image/svg+xml', 'application/xml', 'text/xml'),
'vcf' => 'text/x-vcard',
'srt' => array('text/srt', 'text/plain'),
'vtt' => array('text/vtt', 'text/plain'),
'ico' => array('image/x-icon', 'image/x-ico', 'image/vnd.microsoft.icon'),
'odc' => 'application/vnd.oasis.opendocument.chart',
'otc' => 'application/vnd.oasis.opendocument.chart-template',
'odf' => 'application/vnd.oasis.opendocument.formula',
'otf' => 'application/vnd.oasis.opendocument.formula-template',
'odg' => 'application/vnd.oasis.opendocument.graphics',
'otg' => 'application/vnd.oasis.opendocument.graphics-template',
'odi' => 'application/vnd.oasis.opendocument.image',
'oti' => 'application/vnd.oasis.opendocument.image-template',
'odp' => 'application/vnd.oasis.opendocument.presentation',
'otp' => 'application/vnd.oasis.opendocument.presentation-template',
'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
'ots' => 'application/vnd.oasis.opendocument.spreadsheet-template',
'odt' => 'application/vnd.oasis.opendocument.text',
'odm' => 'application/vnd.oasis.opendocument.text-master',
'ott' => 'application/vnd.oasis.opendocument.text-template',
'oth' => 'application/vnd.oasis.opendocument.text-web'
);
foreach ($extensions as $key => $value) {
if (is_array($value)) {
foreach($value as $k) {
if ($k === $mime) {
return $key;
}
}
}
else {
if ($value === $mime) {
return $key;
}
}
}
return 'unknown';
}
回答2:
I think what you are looking for should be something like this.
var file = "sample.jpg";
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, function(fileSys){
fileSys.root.getDirectory("FolderName",
{create:true, exclusive: false},
function(directory) {
alert("File URL: "+directory.toURL()+file);
}, getDirectoryError);
},
getDirectoryError);
function getDirectoryError(error) {
console.log("getDirectoryError: "+error.code);
}来源：https://stackoverflow.com/questions/31858074/phonegap-file-upload-how-to-get-file-extension