title: 微信公众号开发Django-图片处理 date: 2018-06-21 17:03:39 tags: [微信公众号,Django]

微信公众号开发，图片处理部分

上篇文章已经获取了wx的接口权限 本来想直接使用wx的图像接口,但是后来发现处理js动作有点小麻烦 还有些莫名的错误,就选择了好用的weui.js 挺好用~

(为了少走弯路，建议直接用weui.js)

首先我们设置后端代码接收前端post,在上篇文章已经提到

# Image字段
class Image(models.Model):file = models.ImageField('图片', upload_to=image_filename, blank=True)name = models.CharField('文件名', blank=True, null=True, max_length=256)uploaded_by = models.ForeignKey(FansProfile, verbose_name='上传者', on_delete=models.CASCADE)created_time = models.DateTimeField('创建时间', auto_now_add=True)last_modify_time = models.DateTimeField('最后修改时间', auto_now=True)class activity(View):def post(self,request,*args, **kwargs):request_type = request.POST.get('type')if not request_type:pass # 处理ticket获取elif request_type == 'image/jpeg':files = request.FILES.getlist('fileVal')[0]filename = request.POST.dict()['name']uploader_id = request.COOKIES.get('fanid','')check_id = FansProfile.objects.filter(id=uploader_id).first()if not check_id:return HttpResponseRedirect(web_get_code+'snsapi_base#wechat_redirect')post_image = Image(file = files) # Image数据库模型post_image.uploaded_by = check_idpost_image.name = filename.split('.')[:-1][0]post_image.save()return HttpResponse(json.dumps({'statue':True}),content_type="application/json")
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然后来到前端，下面是简单的实现 就是weui.js文档和演示html的堆砌 详情点击weui.js-docs weui.js预览

{% load static %}
<script>$(document).ready(function () {var uploadCountDom = document.getElementById("uploadCount")var url = location.href.split('#')[0];var uploadCount = 0,uploadList = [];$('#uploaderInput').on("click", function (e) {weui.uploader('#uploader', {url: url,auto: false,type: 'file',fileVal: 'fileVal',compress: {width: 1600,height: 1600,quality: .8},onBeforeQueued: function (files) {// `this` 是轮询到的文件, `files` 是所有文件if (["image/jpg", "image/jpeg", "image/png", "image/gif"].indexOf(this.type) < 0) {weui.alert('请上传图片');return false; // 阻止文件添加}if (this.size > 10 * 1024 * 1024) {weui.alert('请上传不超过10M的图片');return false;}if (files.length > 5) { // 防止一下子选择过多文件weui.alert('最多只能上传5张图片，请重新选择');return false;}if (uploadCount + 1 > 5) {weui.alert('最多只能上传5张图片');return false;}++uploadCount;uploadCountDom.innerHTML = uploadCount// return true; // 阻止默认行为，不插入预览图的框架},onQueued: function () {uploadList.push(this);console.log(this);// console.log(this.status); // 文件的状态：'ready', 'progress', 'success', 'fail'// console.log(this.base64); // 如果是base64上传，file.base64可以获得文件的base64// this.upload(); // 如果是手动上传，这里可以通过调用upload来实现；也可以用它来实现重传。// this.stop(); // 中断上传// return true; // 阻止默认行为，不显示预览图的图像},onBeforeSend: function (data, headers) {console.log(this, data, headers);// $.extend(data, { test: 1 }); // 可以扩展此对象来控制上传参数$.extend(headers, { 'X-CSRFToken': '{{ csrf_token }}' }); // 可以扩展此对象来控制上传头部// return false; // 阻止文件上传},onProgress: function (procent) {console.log(this, procent);// return true; // 阻止默认行为，不使用默认的进度显示},onSuccess: function (ret) {console.log(this, ret);// return true; // 阻止默认行为，不使用默认的成功态},onError: function (err) {console.log(this, err);// return true; // 阻止默认行为，不使用默认的失败态}});})// 缩略图预览document.querySelector('#uploaderFiles').addEventListener('click', function (e) {var target = e.target;while (!target.classList.contains('weui-uploader__file') && target) {target = target.parentNode;}if (!target) return;var url = target.getAttribute('style') || '';var id = target.getAttribute('data-id');if (url) {url = url.match(/url\((.*?)\)/)[1].replace(/"/g, '');}var gallery = weui.gallery(url, {className: 'custom-name',onDelete: function onDelete() {weui.confirm('确定删除该图片？', function () {--uploadCount;uploadCountDom.innerHTML = uploadCount;for (var i = 0, len = uploadList.length; i < len; ++i) {var file = uploadList[i];if (file.id == id) {file.stop();break;}}target.remove();gallery.hide();});}});});document.querySelector('#images-del').addEventListener('click', function () {options.onDelete.call(this, url);});document.querySelector('#confirmBtn').addEventListener('click', function () {weui.confirm('确定提交吗?', function () {uploadList.forEach(function (file) {file.upload();});console.log('yes');}, function () {console.log('no');}, {title: '提交确认'});});});
</script><div class="weui-gallery"><span class="weui-gallery__img"></span><div class="weui-gallery__opr"><a href="javascript:" class="weui-gallery__del"><i class="weui-icon-delete weui-icon_gallery-delete" id="images-del"></i></a></div>
</div>
<div class="weui-cells weui-cells_form" id="uploader"><div class="weui-cell"><div class="weui-cell__bd"><div class="weui-uploader"><div class="weui-uploader__hd"><p class="weui-uploader__title">图片上传</p><div class="weui-uploader__info"><span id="uploadCount">0</span>/5</div></div><div class="weui-uploader__bd"><ul class="weui-uploader__files" id="uploaderFiles"></ul><div class="weui-uploader__input-box"><input id="uploaderInput" class="weui-uploader__input" type="file" accept="image/*" capture="camera" multiple="" /></div></div></div></div></div>
</div>
<div class="weui-btn-area"><a class="weui-btn weui-btn_primary" href="javascript:" id="confirmBtn">确定</a>
</div>
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