添加 Nodejs12.16-COSAnalyzeInventory 函数模板

Nodejs12.16-COSAnalyzeInventory/config.json

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+{
+  "serverless-cloud-function-application": {
+    "Chinese": {
+      "name": "COS 清单文件简易分析",
+      "description": "本函数将源 bucket 中的 COS 清单文件进行简易分析，处理后将结果上传到指定 bucket",
+      "attention": "该函数模板仅供 COS 控制台使用，请勿自行创建",
+      "author": {
+        "name": "腾讯云"
+      }
+    },
+    "English": {
+      "name": "CosAnalyzeInventory",
+      "description": "This function will download cos inventory files from source bucket, analyze them, and upload result file to target bucket",
+      "attention": "This function template is only provided to COS console, please do not use it by yourself",
+      "author": {
+        "name": "Tencent Cloud"
+      }
+    },
+    "runtime": "Nodejs12.16",
+    "readme": "https://github.com/tencentyun/serverless-demo/tree/master/Nodejs12.16-COSAnalyzeInventory",
+    "version": "1.0.8",
+    "tags": ["Nodejs12.16", "analyze inventory", "cos analyze inventory"]
+  }
+}

Nodejs12.16-COSAnalyzeInventory/serverless.yml

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+component: scf
+name: ap-guangzhou_default_CosAnalyzeInventory
+inputs:
+  name: CosAnalyzeInventory
+  src:
+    src: ./src
+  handler: index.main_handler
+  runtime: Nodejs12.16
+  namespace: default
+  region: ap-guangzhou
+  memorySize: 512
+  timeout: 86400

Nodejs12.16-COSAnalyzeInventory/src/common/CosAnalyzeInventoryProcessTask.js

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+/* eslint-disable no-param-reassign */
+const { streamPipelinePromise } = require('./utils');
+const { Readable, PassThrough } = require('stream');
+const Input = require('./Input/index');
+const Filter = require('./Filter/index');
+const Output = require('./Output/index');
+
+class CosAnalyzeInventoryProcessTask {
+  constructor({
+    cosSdkInstance,
+    cosUpload,
+    bucket,
+    region,
+    key,
+    analyzeConfig,
+    sourceList,
+  }) {
+    const analyzeConfigColumns = analyzeConfig.columns.map(item => item.key);
+    sourceList = sourceList.map((item) => {
+      const {
+        type,
+        fileFormat = 'CSV',
+        fileSchema,
+        fileHeaderInfo = 'NONE',
+        fieldDelimiter,
+      } = item;
+      let inputConfig = {};
+      if (fileFormat === 'CSV') {
+        let columns = [];
+        if (fileSchema) {
+          columns = fileSchema
+            .split(',')
+            .map(key => key.trim())
+            .map(key => (key === 'Key' ? 'EncodedKey' : key));
+        } else {
+          columns = analyzeConfigColumns;
+        }
+        const unsetKeys = analyzeConfigColumns.filter(key => !columns.includes(key)
+            && !['Prefix', 'PrefixDepth', 'Key', 'EncodedKey'].includes(key));
+        if (unsetKeys.length > 0) {
+          throw new Error(`${unsetKeys.join(', ')} has not found in file`);
+        }
+        if (analyzeConfig.inputExtractor === 'CosSelect') {
+          inputConfig = {
+            extractor: 'CosSelect',
+            params: {
+              Expression: `Select ${columns
+                .map((item, index) => `_${index + 1} as ${item === 'Key' ? 'EncodedKey' : item}`)
+                .join(', ')} from COSObject`,
+              ExpressionType: 'SQL',
+              InputSerialization: {
+                CompressionType: type === 'gzip' ? 'GZIP' : 'NONE',
+                CSV: {
+                  FileHeaderInfo: fileHeaderInfo,
+                  RecordDelimiter: '\n',
+                  FieldDelimiter:
+                    fieldDelimiter || analyzeConfig.colDelimiter || ',',
+                  QuoteCharacter: '"',
+                  QuoteEscapeCharacter: '"',
+                  AllowQuotedRecordDelimiter: 'TRUE',
+                },
+              },
+              OutputSerialization: {
+                JSON: {
+                  RecordDelimiter: '\n',
+                },
+              },
+              ...(analyzeConfig.cosSelect || {}),
+            },
+          };
+        } else {
+          inputConfig = {
+            extractor: 'CosNormalCsv',
+            params: {
+              InputSerialization: {
+                RecordDelimiter: '\n',
+                FieldDelimiter:
+                  fieldDelimiter || analyzeConfig.colDelimiter || ',',
+                Columns: analyzeConfig.columns || columns.map(key => ({ key })),
+                CompressionType: type === 'gzip' ? 'GZIP' : 'NONE',
+              },
+            },
+          };
+        }
+      }
+      return {
+        ...item,
+        inputConfig,
+      };
+    });
+    Object.assign(this, {
+      cosSdkInstance,
+      cosUpload,
+      bucket,
+      region,
+      key,
+      analyzeConfig,
+      sourceList,
+    });
+  }
+  async runTask() {
+    const input = new Input({
+      cosSdkInstance: this.cosSdkInstance,
+      sourceList: this.sourceList,
+    });
+    const readStream = input.getReadStream();
+    const filter = new Filter({
+      filter: 'InventoryAnalyzeTransformStream',
+      params: {
+        ...this.analyzeConfig,
+        destroySource: () => readStream.end(),
+      },
+    });
+    const output = new Output({
+      cosUpload: this.cosUpload,
+      consumer: 'COS',
+      params: {
+        objectConfig: {
+          Bucket: this.bucket,
+          Region: this.region,
+          Key: this.key,
+        },
+        extraConfig: {},
+      },
+    });
+    const passThrough = new PassThrough();
+    await this.targetSetHeader(passThrough);
+    const { streamList, promiseList } =      output.getWriteStreamListAndPromiseList();
+    const result = await Promise.all([
+      streamPipelinePromise([
+        readStream,
+        filter.getTransformStream(),
+        passThrough,
+      ]),
+      streamPipelinePromise([passThrough, ...streamList]),
+      ...promiseList,
+    ]);
+    return result.pop();
+  }
+  async targetSetHeader(passThrough) {
+    const {
+      select,
+      targetRowDelimiter = '\n',
+      targetColDelimiter = ',',
+      targetSetHeader = true,
+    } = this.analyzeConfig;
+    if (!targetSetHeader) {
+      return;
+    }
+    const headerStr =      select.map(({ label, key }) => label || key).join(targetColDelimiter)
+      + targetRowDelimiter;
+    Readable.from([headerStr]).pipe(passThrough, { end: false });
+  }
+}
+
+module.exports = CosAnalyzeInventoryProcessTask;

Nodejs12.16-COSAnalyzeInventory/src/common/CosAnalyzeInventoryTask.js

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+/* eslint-disable arrow-body-style */
+/* eslint-disable no-unused-vars */
+/* eslint-disable no-param-reassign */
+const ScfInvokeTask = require('./ScfInvokeTask');
+const CosAnalyzeInventoryProcessTask = require('./CosAnalyzeInventoryProcessTask');
+const {
+  validateAnalyzeConfig,
+  fixAnalyzeConfig,
+} = require('./Filter/utils/analyzeUtils');
+
+class CosAnalyzeInventoryTask {
+  constructor({
+    cosSdkInstance,
+    scfSdkInstance,
+    cosUpload,
+    parentRequestId,
+    context,
+    functionName,
+    sourceList,
+    bucket,
+    region,
+    key,
+    prefix,
+    preAnalyzeConfig,
+    analyzeConfig,
+  }) {
+    Object.assign(this, {
+      cosSdkInstance,
+      scfSdkInstance,
+      cosUpload,
+      parentRequestId,
+      context,
+      functionName,
+      sourceList,
+      bucket,
+      region,
+      key: key || `${prefix}${functionName}/${context.request_id}/result.csv`,
+      prefix,
+      preAnalyzeConfig: preAnalyzeConfig
+        ? fixAnalyzeConfig(preAnalyzeConfig)
+        : preAnalyzeConfig,
+      analyzeConfig: fixAnalyzeConfig(analyzeConfig),
+    });
+  }
+  async runTask() {
+    let result;
+    let error;
+    try {
+      let { sourceList } = this;
+      if (
+        !this.parentRequestId
+        && this.preAnalyzeConfig
+        && this.preAnalyzeConfig.columns
+        && this.preAnalyzeConfig.columns.length
+      ) {
+        const partNumber = 20;
+        const scfInvokeTask = new ScfInvokeTask({
+          scfSdkInstance: this.scfSdkInstance,
+          parallel: partNumber,
+          paramsList: this.getSplitList({
+            sourceList,
+            partNumber,
+          }).map((items, index) => ({
+            Region: this.context.tencentcloud_region,
+            FunctionName: this.context.function_name,
+            Namespace: this.context.namespace,
+            InvocationType: 'Event',
+            Qualifier: '$DEFAULT',
+            ClientContext: JSON.stringify({
+              bucket: this.bucket,
+              region: this.region,
+              key: `${this.prefix}${this.functionName}/${this.context.request_id}/tmp/${index}`,
+              analyzeConfig: {
+                ...this.preAnalyzeConfig,
+                targetSetHeader: false,
+              },
+              sourceList: items,
+              parentRequestId: this.context.request_id,
+            }),
+          })),
+        });
+        const scfInvokeTaskResults = await scfInvokeTask.runTask();
+        sourceList = scfInvokeTaskResults.map(({ params }) => {
+          const { ClientContext } = params;
+          const { bucket, region, key } = JSON.parse(ClientContext);
+          return {
+            bucket,
+            region,
+            key,
+            url: this.cosSdkInstance.getObjectUrl({
+              Bucket: bucket,
+              Region: region,
+              Key: key,
+              Sign: false,
+            }),
+            fileFormat: 'CSV',
+            fileSchema: this.analyzeConfig.columns
+              .map(item => item.key)
+              .join(', '),
+          };
+        });
+      }
+      const cosAnalyzeInventoryProcessTask = new CosAnalyzeInventoryProcessTask({
+        cosSdkInstance: this.cosSdkInstance,
+        cosUpload: this.cosUpload,
+        bucket: this.bucket,
+        region: this.region,
+        key: this.key,
+        analyzeConfig: this.analyzeConfig,
+        sourceList,
+      });
+      result = await cosAnalyzeInventoryProcessTask.runTask();
+    } catch (err) {
+      error = err;
+    }
+    return {
+      params: {
+        parentRequestId: this.parentRequestId,
+        context: this.context,
+        functionName: this.functionName,
+        sourceListLength: this.sourceList.length,
+        bucket: this.bucket,
+        region: this.region,
+        key: this.key,
+        prefix: this.prefix,
+        preAnalyzeConfig: this.preAnalyzeConfig,
+        analyzeConfig: this.analyzeConfig,
+      },
+      result,
+      error,
+    };
+  }
+  getSplitList({ sourceList, partNumber = 10 }) {
+    if (sourceList.length <= partNumber) {
+      return sourceList.map(item => [item]);
+    }
+    const list = [...sourceList];
+    const results = Array(partNumber)
+      .fill()
+      .map(() => []);
+    for (let i = 0, len = list.length; i < len; i++) {
+      const item = list[i];
+      results[i % partNumber].push(item);
+    }
+    return results;
+  }
+}
+
+module.exports = CosAnalyzeInventoryTask;

Nodejs12.16-COSAnalyzeInventory/src/common/Filter/index.js

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+const InventoryAnalyzeTransformStream = require('./types/InventoryAnalyzeTransformStream');
+const CustomTransformStream = require('./types/CustomTransformStream');
+const { getCamelCaseData } = require('../utils');
+
+const { PassThrough } = require('stream');
+
+class Filter {
+  constructor({ filter = 'PassThrough', params = {} }) {
+    Object.assign(this, {
+      filter,
+      params,
+      camelCaseParams: getCamelCaseData(params),
+    });
+  }
+  getTransformStream() {
+    const { filter } = this;
+    if (filter === 'PassThrough') {
+      return new PassThrough({
+        readableObjectMode: true,
+        writableObjectMode: true,
+      });
+    }
+    if (filter === 'Custom') {
+      return new CustomTransformStream(this.params);
+    }
+    if (filter === 'InventoryAnalyzeTransformStream') {
+      return new InventoryAnalyzeTransformStream(this.params);
+    }
+    throw new Error(`unknown filter: ${filter}`);
+  }
+}
+
+module.exports = Filter;