Get Mime Type from NSURL

Question

I'm developping an app using a UIDocumentPickerViewController to choose file to send to a server.

I have to retrieve the Mime Type of this file in order to correctly send this file with Amalofire :

Alamofire.upload(.POST, url, headers: headers, multipartFormData: { multipartFormData in
    if let url = attachment as? NSURL, let data = NSData(contentsOfURL: url) {
        multipartFormData.appendBodyPart(data: data, name :"File\(i)",  fileName: "file\(i).\(url.pathExtension)", mimeType: "???")
    }
}

Is there any method able to get the mime type from extension or NSURL ?

Answer 1

I've found that and works well :

internal let DEFAULT_MIME_TYPE = "application/octet-stream"

internal let mimeTypes = [
"html": "text/html",
"htm": "text/html",
"shtml": "text/html",
"css": "text/css",
"xml": "text/xml",
"gif": "image/gif",
"jpeg": "image/jpeg",
"jpg": "image/jpeg",
"js": "application/javascript",
"atom": "application/atom+xml",
"rss": "application/rss+xml",
"mml": "text/mathml",
"txt": "text/plain",
"jad": "text/vnd.sun.j2me.app-descriptor",
"wml": "text/vnd.wap.wml",
"htc": "text/x-component",
"png": "image/png",
"tif": "image/tiff",
"tiff": "image/tiff",
"wbmp": "image/vnd.wap.wbmp",
"ico": "image/x-icon",
"jng": "image/x-jng",
"bmp": "image/x-ms-bmp",
"svg": "image/svg+xml",
"svgz": "image/svg+xml",
"webp": "image/webp",
"woff": "application/font-woff",
"jar": "application/java-archive",
"war": "application/java-archive",
"ear": "application/java-archive",
"json": "application/json",
"hqx": "application/mac-binhex40",
"doc": "application/msword",
"pdf": "application/pdf",
"ps": "application/postscript",
"eps": "application/postscript",
"ai": "application/postscript",
"rtf": "application/rtf",
"m3u8": "application/vnd.apple.mpegurl",
"xls": "application/vnd.ms-excel",
"eot": "application/vnd.ms-fontobject",
"ppt": "application/vnd.ms-powerpoint",
"wmlc": "application/vnd.wap.wmlc",
"kml": "application/vnd.google-earth.kml+xml",
"kmz": "application/vnd.google-earth.kmz",
"7z": "application/x-7z-compressed",
"cco": "application/x-cocoa",
"jardiff": "application/x-java-archive-diff",
"jnlp": "application/x-java-jnlp-file",
"run": "application/x-makeself",
"pl": "application/x-perl",
"pm": "application/x-perl",
"prc": "application/x-pilot",
"pdb": "application/x-pilot",
"rar": "application/x-rar-compressed",
"rpm": "application/x-redhat-package-manager",
"sea": "application/x-sea",
"swf": "application/x-shockwave-flash",
"sit": "application/x-stuffit",
"tcl": "application/x-tcl",
"tk": "application/x-tcl",
"der": "application/x-x509-ca-cert",
"pem": "application/x-x509-ca-cert",
"crt": "application/x-x509-ca-cert",
"xpi": "application/x-xpinstall",
"xhtml": "application/xhtml+xml",
"xspf": "application/xspf+xml",
"zip": "application/zip",
"bin": "application/octet-stream",
"exe": "application/octet-stream",
"dll": "application/octet-stream",
"deb": "application/octet-stream",
"dmg": "application/octet-stream",
"iso": "application/octet-stream",
"img": "application/octet-stream",
"msi": "application/octet-stream",
"msp": "application/octet-stream",
"msm": "application/octet-stream",
"docx": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"xlsx": "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"pptx": "application/vnd.openxmlformats-officedocument.presentationml.presentation",
"mid": "audio/midi",
"midi": "audio/midi",
"kar": "audio/midi",
"mp3": "audio/mpeg",
"ogg": "audio/ogg",
"m4a": "audio/x-m4a",
"ra": "audio/x-realaudio",
"3gpp": "video/3gpp",
"3gp": "video/3gpp",
"ts": "video/mp2t",
"mp4": "video/mp4",
"mpeg": "video/mpeg",
"mpg": "video/mpeg",
"mov": "video/quicktime",
"webm": "video/webm",
"flv": "video/x-flv",
"m4v": "video/x-m4v",
"mng": "video/x-mng",
"asx": "video/x-ms-asf",
"asf": "video/x-ms-asf",
"wmv": "video/x-ms-wmv",
"avi": "video/x-msvideo"
]

internal func MimeType(ext: String?) -> String {
if ext != nil && mimeTypes.contains({ $0.0 == ext!.lowercaseString }) {
        return mimeTypes[ext!.lowercaseString]!
    }
    return DEFAULT_MIME_TYPE
}

extension NSURL {
    public func mimeType() -> String {
        return MimeType(self.pathExtension)
    }
}


extension NSString {
    public func mimeType() -> String {
        return MimeType(self.pathExtension)
    }
}

extension String {
    public func mimeType() -> String {
        return (self as NSString).mimeType()
    }
}

From here

Answer 2

This Gist worked for me: https://gist.github.com/Krivoblotsky/4d5e7c94cd4171b431d0 Here is my adoption:

+ (NSString *)urlToMIME:(NSURL *)url {
    CFStringRef fileExtension = (__bridge CFStringRef)[url pathExtension];
    CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, fileExtension, NULL);
    CFStringRef MIMEType = UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType);
    CFRelease(UTI);
    return (__bridge_transfer NSString *)MIMEType;
}

Answer 3

Try this extension:

import Foundation
import MobileCoreServices

extension URL {
    func mimeType() -> String {
        let pathExtension = self.pathExtension
        if let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, pathExtension as NSString, nil)?.takeRetainedValue() {
            if let mimetype = UTTypeCopyPreferredTagWithClass(uti, kUTTagClassMIMEType)?.takeRetainedValue() {
                return mimetype as String
            }
        }
        return "application/octet-stream"
    }
    var containsImage: Bool {
        let mimeType = self.mimeType()
        guard let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType as CFString, nil)?.takeRetainedValue() else {
            return false
        }
        return UTTypeConformsTo(uti, kUTTypeImage)
    }
    var containsAudio: Bool {
        let mimeType = self.mimeType()
        guard let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType as CFString, nil)?.takeRetainedValue() else {
            return false
        }
        return UTTypeConformsTo(uti, kUTTypeAudio)
    }
    var containsVideo: Bool {
        let mimeType = self.mimeType()
        guard  let uti = UTTypeCreatePreferredIdentifierForTag(kUTTagClassMIMEType, mimeType as CFString, nil)?.takeRetainedValue() else {
            return false
        }
        return UTTypeConformsTo(uti, kUTTypeMovie)
    }

}