2006-10-04 17:16:56 +00:00
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/*
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***** BEGIN LICENSE BLOCK *****
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Copyright (c) 2006 Center for History and New Media
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George Mason University, Fairfax, Virginia, USA
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http://chnm.gmu.edu
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Licensed under the Educational Community License, Version 1.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.opensource.org/licenses/ecl1.php
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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***** END LICENSE BLOCK *****
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*/
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2006-10-02 23:15:27 +00:00
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Zotero.MIME = new function(){
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2007-10-23 07:11:59 +00:00
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this.isTextType = isTextType;
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2006-08-19 20:51:01 +00:00
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this.isExternalTextExtension = isExternalTextExtension;
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2007-10-23 07:11:59 +00:00
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this.getPrimaryExtension = getPrimaryExtension;
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2006-08-19 20:51:01 +00:00
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this.sniffForMIMEType = sniffForMIMEType;
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this.sniffForBinary = sniffForBinary;
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this.getMIMETypeFromData = getMIMETypeFromData;
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this.getMIMETypeFromFile = getMIMETypeFromFile;
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2007-10-23 07:11:59 +00:00
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this.hasNativeHandler = hasNativeHandler;
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2006-08-19 20:51:01 +00:00
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this.hasInternalHandler = hasInternalHandler;
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this.fileHasInternalHandler = fileHasInternalHandler;
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// Magic numbers
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var _snifferEntries = [
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2007-10-23 07:11:59 +00:00
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["%PDF-", "application/pdf", 0],
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["%!PS-Adobe-", 'application/postscript', 0],
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["%! PS-Adobe-", 'application/postscript', 0],
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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["\uFFFD\uFFFD\x11\u0871\x1A\uFFFD\x00\x00", "application/msword", 0],
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2007-10-23 07:11:59 +00:00
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["From", 'text/plain', 0],
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[">From", 'text/plain', 0],
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["#!", 'text/plain', 0],
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["<?xml", 'text/xml', 0],
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["<!DOCTYPE html", 'text/html', 0],
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["<html", 'text/html', 0],
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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["\uFFFD\uFFFD\uFFFD\uFFFD", 'image/jpeg', 0],
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2007-10-23 07:11:59 +00:00
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["GIF8", 'image/gif', 0],
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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["\uFFFDPNG", 'image/png', 0],
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["PK\x03\x04", "application/vnd.oasis.opendocument.text", 0],
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["JFIF", 'image/jpeg'],
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["FLV", "video/x-flv", 0]
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2006-08-19 20:51:01 +00:00
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];
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2007-10-23 07:11:59 +00:00
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var _textTypes = {
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'application/xhtml+xml': true,
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'application/xml': true,
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'application/x-javascript': true
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};
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2006-08-19 20:51:01 +00:00
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// MIME types handled natively by Gecko
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// DEBUG: There's definitely a better way of getting these
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var _nativeMIMETypes = {
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'text/html': true,
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2007-10-23 07:11:59 +00:00
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'text/css': true,
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2006-08-19 20:51:01 +00:00
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'image/jpeg': true,
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'image/gif': true,
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'text/xml': true,
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2007-10-23 07:11:59 +00:00
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'application/xhtml+xml': true,
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'application/xml': true,
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2006-08-19 20:51:01 +00:00
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'text/plain': true,
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'application/x-javascript': true
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};
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// Extensions of text files (generally XML) to force to be external
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var _externalTextExtensions = {
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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graffle: true,
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mm: true
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2006-08-19 20:51:01 +00:00
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};
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2007-10-23 07:11:59 +00:00
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function isTextType(mimeType) {
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return mimeType.substr(0, 5) == 'text/' || _textTypes[mimeType];
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}
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2006-08-19 20:51:01 +00:00
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/*
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* Check if file extension should be forced to open externally
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*/
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function isExternalTextExtension(ext){
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return typeof _externalTextExtensions['ext'] != 'undefined';
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}
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2007-10-23 07:11:59 +00:00
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/*
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* Our own wrapper around the MIME service's getPrimaryExtension() that
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* works a little better
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*/
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function getPrimaryExtension(mimeType, ext) {
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// Enforce some extensions
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switch (mimeType) {
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case 'text/html':
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return 'html';
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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2007-10-23 07:11:59 +00:00
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case 'application/pdf':
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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case 'application/x-pdf':
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case 'application/acrobat':
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case 'applications/vnd.pdf':
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case 'text/pdf':
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case 'text/x-pdf':
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2007-10-23 07:11:59 +00:00
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return 'pdf';
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Merged revisions 2190-2192,2194,2196-2199,2202-2205,2209,2212,2214-2215,2227-2228,2230,2232-2243,2245,2247-2256,2263-2272,2276,2278-2279,2281,2284-2286,2292,2296-2297,2299-2302,2304-2305,2309-2310,2314,2317-2323,2325-2329,2331-2337,2339,2341-2342,2344,2347-2366,2370-2371,2373-2377,2379-2391,2393-2402,2405-2410,2413,2415-2416,2418,2420-2421,2423,2427-2429,2431-2433,2437,2440-2441,2443-2450,2453,2455-2459,2461-2467,2471,2475-2480,2482-2490,2493,2495-2499,2501-2506,2511,2513-2519,2521,2525-2536,2540,2543-2553,2555-2559,2561-2576,2578,2580-2603,2606-2609,2611-2616,2618-2620,2624-2630,2632-2633 to trunk via svnmerge from 1.0 branch
2008-05-05 07:19:34 +00:00
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case 'image/jpg':
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case 'image/jpeg':
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return 'jpg';
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case 'image/gif':
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return 'gif';
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case 'application/msword':
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case 'application/doc':
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case 'application/vnd.msword':
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case 'application/vnd.ms-word':
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case 'application/winword':
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case 'application/word':
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case 'application/x-msw6':
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case 'application/x-msword':
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return 'doc';
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case 'application/vnd.oasis.opendocument.text':
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case 'application/x-vnd.oasis.opendocument.text':
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return 'odt';
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case 'video/flv':
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case 'video/x-flv':
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return 'flv';
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case 'image/tif':
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case 'image/tiff':
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case 'image/tif':
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case 'image/x-tif':
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case 'image/tiff':
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case 'image/x-tiff':
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case 'application/tif':
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case 'application/x-tif':
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case 'application/tiff':
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case 'application/x-tiff':
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return 'tiff';
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case 'application/zip':
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case 'application/x-zip':
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case 'application/x-zip-compressed':
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case 'application/x-compress':
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case 'application/x-compressed':
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case 'multipart/x-zip':
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return 'zip';
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case 'video/quicktime':
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case 'video/x-quicktime':
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return 'mov';
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case 'video/avi':
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case 'video/msvideo':
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case 'video/x-msvideo':
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return 'avi';
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case 'audio/wav':
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|
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case 'audio/x-wav':
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case 'audio/wave':
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return 'wav';
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case 'audio/aiff':
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case 'audio/x-aiff':
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case 'sound/aiff':
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|
|
return 'aiff';
|
2007-10-23 07:11:59 +00:00
|
|
|
}
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|
try {
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|
ext = Components.classes["@mozilla.org/mime;1"]
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|
.getService(Components.interfaces.nsIMIMEService)
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.getPrimaryExtension(mimeType, ext);
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}
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|
// nsIMIMEService.getPrimaryExtension() doesn't work on Linux and
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|
// throws an error if it can't find an extension
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catch (e) {}
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return ext ? ext : '';
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}
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|
2006-08-19 20:51:01 +00:00
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/*
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|
* Searches string for magic numbers
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*/
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|
function sniffForMIMEType(str){
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for (var i in _snifferEntries){
|
2007-10-23 07:11:59 +00:00
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|
var match = false;
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|
// If an offset is defined, match only from there
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|
if (typeof _snifferEntries[i][2] != 'undefined') {
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if (str.substr(i[2]).indexOf(_snifferEntries[i][0]) == 0) {
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match = true;
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}
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}
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|
|
// Otherwise allow match anywhere in sample
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|
|
// (128 bytes from getSample() by default)
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|
else if (str.indexOf(_snifferEntries[i][0]) != -1) {
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|
match = true;
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}
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if (match) {
|
2006-08-19 20:51:01 +00:00
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|
return _snifferEntries[i][1];
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}
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}
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return false;
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}
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/*
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|
|
|
|
* Searches string for embedded nulls
|
|
|
|
|
*
|
|
|
|
|
* Returns 'application/octet-stream' or 'text/plain'
|
|
|
|
|
*/
|
|
|
|
|
function sniffForBinary(str){
|
|
|
|
|
for (var i=0; i<str.length; i++){
|
|
|
|
|
if (!_isTextCharacter(str.charAt(i))){
|
|
|
|
|
return 'application/octet-stream';
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 'text/plain';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Try to determine the MIME type of a string, using a few different
|
|
|
|
|
* techniques
|
|
|
|
|
*
|
|
|
|
|
* ext is an optional file extension hint if data sniffing is unsuccessful
|
|
|
|
|
*/
|
|
|
|
|
function getMIMETypeFromData(str, ext){
|
2007-10-23 07:11:59 +00:00
|
|
|
var mimeType = sniffForMIMEType(str);
|
2006-08-19 20:51:01 +00:00
|
|
|
if (mimeType){
|
2006-10-02 23:15:27 +00:00
|
|
|
Zotero.debug('Detected MIME type ' + mimeType);
|
2006-08-19 20:51:01 +00:00
|
|
|
return mimeType;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
try {
|
2007-10-23 07:11:59 +00:00
|
|
|
if (ext) {
|
|
|
|
|
var mimeType = Components.classes["@mozilla.org/uriloader/external-helper-app-service;1"]
|
|
|
|
|
.getService(Components.interfaces.nsIMIMEService).getTypeFromExtension(ext);
|
|
|
|
|
Zotero.debug('Got MIME type ' + mimeType + ' from extension');
|
|
|
|
|
return mimeType;
|
|
|
|
|
}
|
2006-08-19 20:51:01 +00:00
|
|
|
}
|
2007-10-23 07:11:59 +00:00
|
|
|
catch (e) {}
|
|
|
|
|
|
|
|
|
|
var mimeType = sniffForBinary(str);
|
|
|
|
|
Zotero.debug('Cannot determine MIME type from magic number or extension -- settling for ' + mimeType);
|
|
|
|
|
return mimeType;
|
2006-08-19 20:51:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Try to determine the MIME type of the file, using a few different
|
|
|
|
|
* techniques
|
|
|
|
|
*/
|
|
|
|
|
function getMIMETypeFromFile(file){
|
2006-10-02 23:15:27 +00:00
|
|
|
var str = Zotero.File.getSample(file);
|
|
|
|
|
var ext = Zotero.File.getExtension(file);
|
2006-08-19 20:51:01 +00:00
|
|
|
|
2007-10-23 07:11:59 +00:00
|
|
|
return getMIMETypeFromData(str, ext);
|
2006-08-19 20:51:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
2007-10-23 07:11:59 +00:00
|
|
|
* Determine if a MIME type can be handled natively
|
|
|
|
|
* or if it needs to be passed off to a plugin or external helper app
|
2006-08-19 20:51:01 +00:00
|
|
|
*
|
|
|
|
|
* ext is an optional extension hint (only needed for text/plain files
|
|
|
|
|
* that should be forced to open externally)
|
|
|
|
|
*
|
|
|
|
|
* Note: it certainly seems there should be a more native way of doing this
|
|
|
|
|
* without replicating all the Mozilla functionality
|
|
|
|
|
*
|
|
|
|
|
* Note: nsIMIMEInfo provides a hasDefaultHandler() method, but it doesn't
|
|
|
|
|
* do what we need
|
|
|
|
|
*/
|
2007-10-23 07:11:59 +00:00
|
|
|
function hasNativeHandler(mimeType, ext) {
|
2006-08-19 20:51:01 +00:00
|
|
|
if (mimeType=='text/plain'){
|
2007-10-23 07:11:59 +00:00
|
|
|
if (isExternalTextExtension(ext)){
|
2006-10-02 23:15:27 +00:00
|
|
|
Zotero.debug('text/plain file has extension that should be handled externally');
|
2006-08-19 20:51:01 +00:00
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (_nativeMIMETypes[mimeType]){
|
2006-10-02 23:15:27 +00:00
|
|
|
Zotero.debug('MIME type ' + mimeType + ' can be handled natively');
|
2006-08-19 20:51:01 +00:00
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
2007-10-23 07:11:59 +00:00
|
|
|
return null;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Determine if a MIME type can be handled internally
|
|
|
|
|
* or if it needs to be passed off to an external helper app
|
|
|
|
|
*
|
|
|
|
|
* Similar to hasNativeHandler() but also includes plugins
|
|
|
|
|
*/
|
|
|
|
|
function hasInternalHandler(mimeType, ext) {
|
|
|
|
|
var isNative = hasNativeHandler(mimeType, ext);
|
|
|
|
|
if (isNative !== null) {
|
|
|
|
|
return isNative;
|
|
|
|
|
}
|
|
|
|
|
|
2006-08-19 20:51:01 +00:00
|
|
|
// Is there a better way to get to navigator?
|
|
|
|
|
var types = Components.classes["@mozilla.org/appshell/appShellService;1"]
|
|
|
|
|
.getService(Components.interfaces.nsIAppShellService)
|
|
|
|
|
.hiddenDOMWindow.navigator.mimeTypes;
|
|
|
|
|
|
|
|
|
|
for (var i in types){
|
2007-10-23 07:11:59 +00:00
|
|
|
if (types[i].type && types[i].type == mimeType){
|
2006-10-02 23:15:27 +00:00
|
|
|
Zotero.debug('MIME type ' + mimeType + ' can be handled by plugins');
|
2006-08-19 20:51:01 +00:00
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
2006-10-02 23:15:27 +00:00
|
|
|
Zotero.debug('MIME type ' + mimeType + ' cannot be handled natively');
|
2006-08-19 20:51:01 +00:00
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
function fileHasInternalHandler(file){
|
2007-10-23 07:11:59 +00:00
|
|
|
var mimeType = getMIMETypeFromFile(file);
|
2006-10-02 23:15:27 +00:00
|
|
|
var ext = Zotero.File.getExtension(file);
|
2007-10-23 07:11:59 +00:00
|
|
|
return hasInternalHandler(mimeType, ext);
|
2006-08-19 20:51:01 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Detect whether a character is text
|
|
|
|
|
*
|
|
|
|
|
* Based on RFC 2046 Section 4.1.2. Treat any char 0-31
|
|
|
|
|
* except the 9-13 range (\t, \n, \v, \f, \r) and char 27 (used by
|
|
|
|
|
* encodings like Shift_JIS) as non-text
|
|
|
|
|
*
|
|
|
|
|
* This is the logic used by the Mozilla sniffer.
|
|
|
|
|
*/
|
|
|
|
|
function _isTextCharacter(chr){
|
|
|
|
|
var chr = chr.charCodeAt(0);
|
|
|
|
|
return chr > 31 || (9 <= chr && chr <=13 ) || chr == 27;
|
|
|
|
|
}
|
|
|
|
|
}
|
