封装上传文件组件（axios，onUploadProgress，取消请求）

目录

定时模拟进度条

方法

A.axios

B.xhr

取消请求​​​​​​​

完整代码

A.自定义上传组件

B.二次封装组件

情况

增加cancelToken不生效，刷新页面

进度条太快->设置浏览器网速

定时模拟进度条

    startUpload() {
        if (!this.file) return;

        const totalSize = this.file.size;
        let uploadedSize = 0;

        const interval = setInterval(() => {
            if (uploadedSize >= totalSize) {
                clearInterval(interval);
                // this.state_tip = STATE_TIPS.get('上传成功');
            } else {
                uploadedSize += 1024;
                this.progress = Math.round((uploadedSize / totalSize) * 100);
            }
        }, 200);
    }

方法

A.axios

 uploadQuery() {
        if (!this.file) return;
        this.state_tip = STATE_TIPS.get('上传中');
        this.progress = 0;
        // headers = {'Content-Type': 'multipart/form-data'}
        const formData = new FormData()
        formData.append('file', this.file)
        axios.post(this.uploadPath, formData, {
            headers: {
                "X-Requested-With": "XMLHttpRequest",
            },
            onUploadProgress: (progressEvent: ProgressEvent) => {
                console.log("onUploadProgress");
                if (progressEvent.lengthComputable) {
                    this.progress = Math.round(
                        (progressEvent.loaded / progressEvent.total) * 100
                    );
                    console.log(this.progress);
                }
            },
        }).then((res: any) => {
            if (res && res.code == 200) {
                this.uploadExel = res.data;
                this.state_tip = STATE_TIPS.get('上传成功');
                console.log(this.uploadExel);
                this.$emit("update:uploadExel", this.uploadExel);
            } else {
                this.state_tip = STATE_TIPS.get('其他');
                this.state_tip.tip = res.msg || '请取消上传，更换符合模板要求的文件';
            }
        }).catch((error: any) => {
            this.state_tip = STATE_TIPS.get('上传失败');
        }).finally(() => {
            this.uploaded = true;
            this.$emit("update:uploaded", this.uploaded);
        });
    }

B.xhr

   uploadQuery(file: File) {
        // headers = {'Content-Type': 'multipart/form-data'}
        const formData = new FormData()
        formData.append('file', file)
        const xhr = new XMLHttpRequest();
        xhr.open("POST", this.uploadPath, true);

        xhr.upload.onprogress = (event) => {
            if (event.lengthComputable) {
                this.uprogress = Math.round((event.loaded / event.total) * 100);
            }
        };

        xhr.onload = () => {
            console.log(xhr);
            
            if (xhr.status === 200) {
                const res = JSON.parse(xhr.responseText);
                console.log(res);
                console.log(res.code);
                if (res.code === 200) {
                    this.uploadExel = res.data;
                    this.state_tip = "上传成功";
                    this.uploaded = true;
                    console.log(this.uploadExel);
                    this.$emit("update:uploaded", this.uploaded);
                    this.$emit("update:uploadExel", this.uploadExel);
                } else {
                    // 处理上传失败情况
                    this.state_tip = "上传失败";
                }
            }
        };

        xhr.onerror = () => {
            // 处理上传出错情况
            this.state_tip = "上传出错";
        };

        xhr.send(formData);
        // request.post(this.uploadPath, formData).then((res: any) => {

        //     if (res.code == 200) {
        //         this.uploadExel = res.data;
        //         this.state_tip = STATE_TIPS.get('上传成功');
        //         this.uploaded = true;
        //         this.$emit("update:uploaded", this.uploaded);
        //         this.$emit("update:uploadExel", this.uploadExel);
        //     } else {

        //     }
        // })
    }

取消请求​​​​​​​

完整代码

A.自定义上传组件

B.二次封装组件

情况

增加cancelToken不生效，刷新页面

进度条太快->设置浏览器网速