media.service.ts•5.13 kB
import COS from 'cos-nodejs-sdk-v5';
export class CIMediaService {
bucket: string;
region: string;
cos: COS;
constructor(bucket: string, region: string, cos: COS) {
this.bucket = bucket;
this.region = region;
this.cos = cos;
}
async createMediaSmartCoverJob(objectKey: string) {
try {
var host = this.bucket + '.ci.' + this.region + '.myqcloud.com/jobs';
var url = 'https://' + host;
const lastDotIndex = objectKey.lastIndexOf('.');
const base =
lastDotIndex === -1 ? objectKey : objectKey.substring(0, lastDotIndex);
const outPutObject = `${base}_\${jobid}_\${number}`;
var body = COS.util.json2xml({
Request: {
Tag: 'SmartCover',
Input: {
Object: objectKey, // 存在cos里的路径
},
Operation: {
Output: {
Bucket: this.bucket,
Region: this.region,
Object: outPutObject, // 转码后存到cos的路径
},
SmartCover: {
Count: 1,
},
},
},
});
const createResult = await new Promise((resolve, reject) => {
this.cos.request(
{
Key: 'jobs',
Method: 'POST', // 固定值
Url: url,
Body: body,
ContentType: 'application/xml',
},
(error, data) => (error ? reject(error) : resolve(data)),
);
});
try {
const jobsDetail = (createResult as any).Response.JobsDetail;
const initialCode = jobsDetail.Code;
const initialState = jobsDetail.State;
if (initialCode == 'Failed') {
return {
isSuccess: false,
message: '智能封面任务失败',
data: createResult,
};
}
if (initialState == 'Success') {
return {
isSuccess: true,
message: '智能封面任务成功',
data: createResult,
};
} else {
const jobId = jobsDetail.JobId;
// 开始轮询
let pollResult: any;
const maxAttempts = 10;
const interval = 4000;
for (let attempt = 0; attempt < maxAttempts; attempt++) {
// 首次立即执行，后续等待间隔
if (attempt > 0) await new Promise((r) => setTimeout(r, interval));
try {
// 查询任务状态
const { data: getResult } = await this.describeMediaJob(jobId);
const describeJobsDetail = (getResult as any).Response.JobsDetail;
const describeJobCode = describeJobsDetail.Code;
const describeJobState = describeJobsDetail.State;
// 处理终态
if (
describeJobCode === 'Success' &&
describeJobState == 'Success'
) {
pollResult = getResult;
break;
} else if (describeJobCode === 'Failed') {
return {
isSuccess: false,
message: '智能封面任务失败',
data: getResult,
};
}
} catch (err) {
// lastError = err as Error; // 记录错误继续重试
}
}
if (!pollResult) {
return {
isSuccess: false,
message: `轮询超时（${maxAttempts}次未完成）`,
data: createResult,
};
}
return {
isSuccess: true,
message: '智能封面任务成功',
data: pollResult,
};
}
} catch (error) {
return {
isSuccess: false,
message: '智能封面任务失败',
data: error,
};
}
} catch (error) {
return {
isSuccess: false,
message: '智能封面任务失败',
data: error,
};
}
}
async describeMediaJob(jobId: string) {
try {
let host = this.bucket + '.ci.' + this.region + '.myqcloud.com';
let url = 'https://' + host + '/doc_jobs/' + jobId;
const result = await new Promise((resolve, reject) => {
this.cos.request(
{
Bucket: this.bucket, // Bucket 格式：test-1250000000
Region: this.region,
Method: 'GET',
Key: 'doc_jobs/' + jobId,
Url: url,
},
function (error, data) {
if (error) {
// 处理请求失败
reject(error);
} else {
// 处理请求成功
resolve(data);
//获取返回的jobid， 去调查询任务接口， 返回具体信息
}
},
);
});
return {
isSuccess: true,
message: '智能封面任务查询成功',
data: result,
};
} catch (error) {
return {
isSuccess: false,
message: '智能封面任务查询失败',
data: error,
};
}
}
}