helper.js
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var regExpWidth = new RegExp('{width}', 'g');
var regExpHeight = new RegExp('{height}', 'g');
var regExpMode = new RegExp('{mode}', 'g');
var regExpQg = new RegExp('/q/d+', 'g');
var regExpQ = new RegExp('/q/d+');
var regExpQuality = new RegExp('/quality/d+');
var regExpQualityg = new RegExp('/quality/d+', 'g');
var regExpImageView = new RegExp('imageView');
var regExpImageMogr = new RegExp('imageMogr');
var defaultQuality = 75;
function image(imgUrl, w, h, mode, q) {
var urls,
query,
url;
var params = {
w: w,
h: h,
mode: mode || 2,
q: q || defaultQuality
};
if (imgUrl && (typeof imgUrl === 'string')) {
urls = imgUrl.split('?');
query = urls[1] || '';
url = urls[0];
if (url.indexOf('http:') === 0) {
url = url.replace('http:', 'https:');
}
if (!query || query === 'imageslim') {
url += params.q === defaultQuality ? '?imageslim' : '?imageView2/0/interlace/1/q/' + params.q;
imgUrl = url;
} else {
imgUrl = imgUrl.replace(regExpWidth, params.w)
.replace(regExpHeight, params.h)
.replace(regExpMode, (params.mode));
if (regExpImageView.test(query)) { // imageView2 || imageView
if (!regExpQ.test(query)) {
imgUrl += '/q/' + params.q;
} else {
imgUrl = imgUrl.replace(regExpQg, '/q/' + params.q);
}
} else if (regExpImageMogr.test(query)) {
if (!regExpQuality.test(query)) {
imgUrl += '/quality/' + params.q;
} else {
imgUrl = imgUrl.replace(regExpQualityg, '/quality/' + params.q);
}
}
}
return imgUrl;
} else {
return '';
}
}
// 如果图片没有imageView2，则默认添加imageView2
function imgView(imgSrc, w, h, mode, q) {
var imgUrl = imgSrc || '';
var indexOf = imgUrl.indexOf('?');
if (!imgUrl) {
return '';
}
if (imgUrl.indexOf('http://') === imgUrl.indexOf('https://')) {
return imgUrl;
}
if (indexOf === -1) {
imgUrl += '?imageView2/{mode}/w/{width}/h/{height}';
return image(imgUrl, w, h, mode, q);
}
if (indexOf > -1) {
return image(imgUrl, w, h, mode, q);
}
return imgUrl;
}
module.exports = {
image: image,
imgView: imgView
};