From 6272372df5c2ec1deaf1a3aa63c1b01a8e0120d3 Mon Sep 17 00:00:00 2001 From: Eric Ellingson Date: Sat, 13 Jan 2018 15:32:34 -0800 Subject: [PATCH] add support for promises; closes #6 --- base64-img.js | 70 +++++- package-lock.json | 559 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 620 insertions(+), 9 deletions(-) create mode 100644 package-lock.json diff --git a/base64-img.js b/base64-img.js index 10bb7c3..aeff99e 100644 --- a/base64-img.js +++ b/base64-img.js @@ -5,7 +5,7 @@ var request = require('ajax-request'); function base64(filename, data) { var extname = path.extname(filename).substr(1); extname = extname || 'png'; - + return 'data:image/' + extname + ';base64,' + data.toString('base64'); } @@ -28,16 +28,56 @@ function img(data) { }; } +function base64Promise(filename) { + return new Promise((resolve, reject) => { + fs.readFile(filename, function (err, data) { + if (err) reject(err); + + resolve(base64(filename, data)); + }); + }); +}; + +function requestBase64Promise(url) { + return new Promise((resolve, reject) => { + request({ + url: url, + isBuffer: true + }, function (err, res, body) { + if (err) return reject(err); + + var data = 'data:' + res.headers['content-type'] + ';base64,' + body.toString('base64'); + resolve({ res, data }); + }); + }); +}; + +function imgPromise(data, destpath, name) { + return new Promise((resolve, reject) => { + var result = img(data); + var filepath = path.join(destpath, name + result.extname); + + fs.writeFile(filepath, result.base64, { encoding: 'base64' }, function (err) { + if (err) return reject(err); + resolve(filepath); + }); + }); +}; + /** * @description * Get image file base64 data * @example * base64Img.base64('path/demo.png', function(err, data) {}) + * @example + * base64Img.base64('path/demo.png').then(function(data) { + * + * }); */ -exports.base64 = function(filename, callback) { - if (!callback) callback = util.noop; +exports.base64 = function (filename, callback) { + if (!callback) return base64Promise(filename); - fs.readFile(filename, function(err, data) { + fs.readFile(filename, function (err, data) { if (err) return callback(err); callback(null, base64(filename, data)); @@ -50,7 +90,7 @@ exports.base64 = function(filename, callback) { * @example * var data = base64Img.base64Sync('path/demo.png'); */ -exports.base64Sync = function(filename) { +exports.base64Sync = function (filename) { var data = fs.readFileSync(filename); return base64(filename, data); @@ -66,8 +106,16 @@ exports.base64Sync = function(filename) { * * } * ); + * @example + * request.base64( + * 'http://webresource.c-ctrip.com/ResCRMOnline/R5/html5/images/57.png', + * ).then(function({res, data}) { + * + * }); */ -exports.requestBase64 = function(url, callback) { +exports.requestBase64 = function (url, callback) { + if (!callback) return requestBase64Promise(url); + request({ url: url, isBuffer: true @@ -84,12 +132,16 @@ exports.requestBase64 = function(url, callback) { * Convert image base64 data to img * @example * base64Img.img('data:image/png;base64,...', 'dest', '1', function(err, filepath) {}); + * @example + * base64Img.img('data:image/png;base64,...', 'dest', '1').then(function(filepath) {}); */ -exports.img = function(data, destpath, name, callback) { +exports.img = function (data, destpath, name, callback) { + if (!callback) return imgPromise(data, destpath, name); + var result = img(data); var filepath = path.join(destpath, name + result.extname); - fs.writeFile(filepath, result.base64, { encoding: 'base64' }, function(err) { + fs.writeFile(filepath, result.base64, { encoding: 'base64' }, function (err) { callback(err, filepath); }); }; @@ -100,7 +152,7 @@ exports.img = function(data, destpath, name, callback) { * @example * var filepath = base64Img.imgSync('data:image/png;base64,...', 'dest', '1'); */ -exports.imgSync = function(data, destpath, name) { +exports.imgSync = function (data, destpath, name) { var result = img(data); var filepath = path.join(destpath, name + result.extname); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..0efd999 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,559 @@ +{ + "name": "base64-img", + "version": "1.0.3", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "abbrev": { + "version": "1.1.1", + "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.1.tgz", + "integrity": "sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==", + "dev": true + }, + "ajax-request": { + "version": "1.2.3", + "resolved": "https://registry.npmjs.org/ajax-request/-/ajax-request-1.2.3.tgz", + "integrity": "sha1-mfy+wdbSeS+F+pSVNTMr0U9fN5A=", + "requires": { + "file-system": "2.2.2", + "utils-extend": "1.0.8" + } + }, + "argparse": { + "version": "0.1.16", + "resolved": "https://registry.npmjs.org/argparse/-/argparse-0.1.16.tgz", + "integrity": "sha1-z9AeD7uj1srtBJ+9dY1A9lGW9Xw=", + "dev": true, + "requires": { + 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