Class AxiosPlugin

src/plugins/AxiosPlugin.ts:32–125

import * as path from 'path';

class AxiosPlugin implements SwPlugin {
  readonly module = 'axios';
  readonly versions = '*';

  getVersion(installer: PluginInstaller): string {
    // TODO: this method will not work in a bundle
    try {
      const indexPath = installer.resolve(this.module);
      const dirname = indexPath.slice(
        0,
        indexPath.lastIndexOf(`${path.sep}node_modules${path.sep}axios${path.sep}`) + 20,
      );
      const packageJsonStr = fs.readFileSync(`${dirname}package.json`, { encoding: 'utf-8' });
      const pkg = JSON.parse(packageJsonStr);
      return pkg.version;
    } catch {
      return '';
    }
  }

  install(installer: PluginInstaller): void {
    this.interceptClientRequest(installer);
  }

  private interceptClientRequest(installer: PluginInstaller): void {
    const axios = installer.require?.('axios') ?? require('axios');
    const Axios = axios.Axios;
    const _request = Axios.prototype.request;

    Axios.prototype.request = axios.request = function (url?: any, config?: any) {
      if (typeof url === 'string') config = config ? { ...config, url } : { url };
      else config = url ? { ...url } : {};

      const { origin, host, pathname: operation } = new URL(config.url, config.baseURL ?? this.defaults?.baseURL);
      const method = (config.method || 'GET').toUpperCase();
      const span = ignoreHttpMethodCheck(method)
        ? DummySpan.create()
        : ContextManager.current.newExitSpan(operation, Component.AXIOS, Component.HTTP);

      span.start();

      try {
        config.headers = config.headers ? { ...config.headers } : {};

        span.component = Component.AXIOS;
        span.layer = SpanLayer.HTTP;
        span.peer = host;

        span.tag(Tag.httpURL(origin + operation));
        span.tag(Tag.httpMethod(method));

        span.inject().items.forEach((item) => (config.headers[item.key] = item.value));

        const copyStatus = (response: any) => {
          if (response) {
            if (response.status) {
              span.tag(Tag.httpStatusCode(response.status));