How to use @faasjs/request - 4 common examples

const headers = Object.assign(JSON.parse(JSON.stringify(ctx.req.headers)), {
      'Content-Type': 'application/json'
    });
    // 避免与url的host冲突，删除 host
    delete headers.host;

    if (headers['set-cookie']) {
      headers.cookie = headers['set-cookie'][0];
      delete headers.cookie;
    }
    console.log('[faas][server] action:', url, headers);

    if (body && typeof body !== 'string') {
      body = JSON.stringify(body);
    }
    return request(url, {
      headers,
      method: 'POST',
      body,
    }).then(function (res: RequestResponse) {
      // 若有 set-cookie 则写入到 ctx.res
      if (res.headers && res.headers['set-cookie'] && Array.isArray(res.headers['set-cookie'])) {
        const cookies = [];
        for (let cookie of res.headers['set-cookie']) {
          // 在开发模式下修改 cookie 的 domain
          if (ctx.isDev) {
            if (ctx.req.headers.host) {
              // 若有 host 信息，则修改为当前 host 的根域名
              let host = ctx.req.headers.host!.split('.');
              cookie = cookie.replace(/domain=[^;]+;/, `domain=${host[host.length - 2]}.${host[host.length - 1]};`);
            } else {
              // 没有 host 信息则直接删除 domain 配置

export default function (provider: any, params: any) {
  params = Object.assign({
    Nonce: Math.round(Math.random() * 65535),
    Region: provider.region,
    SecretId: provider.secretId,
    SignatureMethod: 'HmacSHA256',
    Timestamp: Math.round(Date.now() / 1000) - 1,
    Version: '2018-04-16',
  }, params);
  params = mergeData(params);

  const sign = 'POSTapigateway.api.qcloud.com/v2/index.php?' + formatSignString(params);

  params.Signature = crypto.createHmac('sha256', provider.secretKey).update(sign).digest('base64');

  return request('https://apigateway.api.qcloud.com/v2/index.php?', {
    body: params,
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    method: 'POST',
  }).then(function (res) {
    try {
      res.body = JSON.parse(res.body);
    } catch (error) {
      return Promise.reject(error);
    }
    if (res.body.code) {
      console.error(res.body);
      return Promise.reject(Error(JSON.stringify(res.body)));
    } else {
      return res.body;
    }
  });

export default function action (this: Tencentcloud, params: any) {
  params = Object.assign({
    Nonce: Math.round(Math.random() * 65535),
    Region: this.config.region,
    SecretId: this.config.secretId,
    SignatureMethod: 'HmacSHA256',
    Timestamp: Math.round(Date.now() / 1000) - 1,
    Version: '2018-04-16',
  }, params);
  params = mergeData(params);

  const sign = 'POSTscf.tencentcloudapi.com/?' + formatSignString(params);

  params.Signature = crypto.createHmac('sha256', this.config.secretKey).update(sign).digest('base64');

  return request('https://scf.tencentcloudapi.com/?', {
    body: params,
    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
    method: 'POST',
  }).then(function (res) {
    if (res.body.Response.Error) {
      console.error(res.body);
      return Promise.reject(res.body.Response.Error);
    } else {
      return res.body.Response;
    }
  });
}

export function invokeCloudFunction (this: Tencentcloud, name: string, data?: any, options?: {
  [key: string]: any;
}) {
  this.logger.debug('invokeFunction: %s %o', name, options);

  if (process.env.FaasMode === 'local' && process.env.FaasLocal) {
    return request(process.env.FaasLocal + '/' + name, {
      headers: {
        'Content-Type': 'application/json'
      },
      body: JSON.stringify(data),
      method: 'POST'
    });
  } else {
    return scf.call(this, Object.assign({
      Action: 'Invoke',
      FunctionName: name.replace(/[^a-zA-Z0-9-_]/g, '_'),
      ClientContext: JSON.stringify(data),
      InvocationType: 'Event',
      Namespace: process.env.FaasEnv,
      Qualifier: process.env.FaasEnv
    }, options || {})).then(function (res) {
      if (res.Result.ErrMsg) {