@alauda-fe/common
Version:
Alauda frontend team common codes.
101 lines • 19.1 kB
JavaScript
import { HttpEventType, } from '@angular/common/http';
import { inject } from '@angular/core';
import { map, switchMap } from 'rxjs';
import { TOKEN_RESOURCE_DEFINITIONS, compareVersion, parseJSONStream, } from '../core/public-api';
import { ClusterVersionService } from './cluster-version.service';
export class ApiCompatibleInterceptor {
constructor() {
this.clusterVersion = inject(ClusterVersionService);
}
intercept(req, next) {
const matchResult = this.matchUrl(req.url);
if (!matchResult.matched) {
return next.handle(req);
}
return this.clusterVersion.getClusterVersion(matchResult.cluster).pipe(switchMap(clusterVersion => {
const nextReq = this.executeRequestDowngrade(clusterVersion, req);
const nextReqBody = this.executeRequestBodyDowngrade(clusterVersion, nextReq.method, nextReq.body);
return next.handle(nextReq.clone({ body: nextReqBody })).pipe(map(event => {
if (event.type === HttpEventType.Response) {
return event.clone({
body: this.executeResponseBodyUpgrade(clusterVersion, nextReq.method, event.body),
});
}
// k8s watch api
if (isHttpDownloadProgressEvent(event) && event.partialText) {
return {
...event,
partialText: parseJSONStream(event.partialText)
.map(v => JSON.stringify({
...v,
object: this.executeResponseBodyUpgrade(clusterVersion, nextReq.method, v.object),
}))
.join('\n'),
};
}
return event;
}));
}));
}
executeRequestDowngrade(clusterVersion, req) {
return this.requestAdapters
.filter(adapter => !!adapter.requestDowngrade &&
compareVersion.lt(clusterVersion, adapter.clusterVersion) &&
(!adapter.httpMethods || adapter.httpMethods.includes(req.method)))
.sort((a, b) => compareVersion.lt(a.clusterVersion, b.clusterVersion) ? -1 : 1)
.reduceRight((nextReq, adapter) => adapter.requestDowngrade(nextReq), req);
}
executeRequestBodyDowngrade(clusterVersion, httpMethod, body) {
return this.requestAdapters
.filter(adapter => !!adapter.bodyDowngrade &&
compareVersion.lt(clusterVersion, adapter.clusterVersion) &&
(adapter.httpMethods || ['POST', 'PUT', 'PATCH']).includes(httpMethod))
.sort((a, b) => compareVersion.lt(a.clusterVersion, b.clusterVersion) ? -1 : 1)
.reduceRight((nextBody, adapter) => adapter.bodyDowngrade(nextBody), body);
}
executeResponseBodyUpgrade(clusterVersion, httpMethod, body) {
return this.responseAdapters
.filter(adapter => compareVersion.lt(clusterVersion, adapter.clusterVersion) &&
(adapter.httpMethods || ['GET', 'POST', 'PUT', 'PATCH']).includes(httpMethod))
.sort((a, b) => compareVersion.lt(a.clusterVersion, b.clusterVersion) ? -1 : 1)
.reduce((nextBody, adapter) => adapter.bodyUpgrade(nextBody), body);
}
}
export function k8sApiMatcher(resourceType) {
const resourceDefinitions = inject(TOKEN_RESOURCE_DEFINITIONS);
const define = typeof resourceType === 'string'
? resourceDefinitions[resourceType]
: resourceType;
const { apiGroup, apiVersion, type } = define;
if (!define) {
throw new TypeError(`Resource type '${resourceType}' is not defined`);
}
return (url) => {
const reg = new RegExp(`/kubernetes/([^/]+)/apis/${apiGroup}/${apiVersion}/(?:namespaces/[^/]+/)?${type}`);
const matched = url.match(reg);
return matched
? {
matched: true,
cluster: matched[1],
}
: { matched: false };
};
}
export function k8sResourceOrList(mapper) {
return (res) => {
if (isK8SResourceList(res)) {
return {
...res,
items: res.items.map(mapper),
};
}
return mapper(res);
};
}
function isK8SResourceList(res) {
return 'items' in res && Array.isArray(res.items);
}
function isHttpDownloadProgressEvent(event) {
return event.type === HttpEventType.DownloadProgress;
}
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{\n  HttpDownloadProgressEvent,\n  HttpEvent,\n  HttpEventType,\n  HttpHandler,\n  HttpInterceptor,\n  HttpRequest,\n} from '@angular/common/http';\nimport { inject } from '@angular/core';\nimport { Observable, map, switchMap } from 'rxjs';\n\nimport {\n  KubernetesResource,\n  KubernetesResourceList,\n  TOKEN_RESOURCE_DEFINITIONS,\n  compareVersion,\n  parseJSONStream,\n} from '../core/public-api';\n\nimport { ClusterVersionService } from './cluster-version.service';\nimport { K8sResourceDefinition, WatchAPIResponse } from './types';\n\nexport abstract class ApiCompatibleInterceptor implements HttpInterceptor {\n  abstract matchUrl(req: string): MatchResult;\n  abstract responseAdapters: ResponseAdapter[];\n  abstract requestAdapters: RequestAdapter[];\n\n  protected clusterVersion = inject(ClusterVersionService);\n\n  intercept(\n    req: HttpRequest<unknown>,\n    next: HttpHandler,\n  ): Observable<HttpEvent<unknown>> {\n    const matchResult = this.matchUrl(req.url);\n\n    if (!matchResult.matched) {\n      return next.handle(req);\n    }\n\n    return this.clusterVersion.getClusterVersion(matchResult.cluster).pipe(\n      switchMap(clusterVersion => {\n        const nextReq = this.executeRequestDowngrade(clusterVersion, req);\n        const nextReqBody = this.executeRequestBodyDowngrade(\n          clusterVersion,\n          nextReq.method,\n          nextReq.body,\n        );\n        return next.handle(nextReq.clone({ body: nextReqBody })).pipe(\n          map(event => {\n            if (event.type === HttpEventType.Response) {\n              return event.clone({\n                body: this.executeResponseBodyUpgrade(\n                  clusterVersion,\n                  nextReq.method,\n                  event.body,\n                ),\n              });\n            }\n\n            // k8s watch api\n            if (isHttpDownloadProgressEvent(event) && event.partialText) {\n              return {\n                ...event,\n                partialText: parseJSONStream<WatchAPIResponse<unknown>>(\n                  event.partialText,\n                )\n                  .map(v =>\n                    JSON.stringify({\n                      ...v,\n                      object: this.executeResponseBodyUpgrade(\n                        clusterVersion,\n                        nextReq.method,\n                        v.object,\n                      ),\n                    }),\n                  )\n                  .join('\\n'),\n              };\n            }\n\n            return event;\n          }),\n        );\n      }),\n    );\n  }\n\n  private executeRequestDowngrade(\n    clusterVersion: string,\n    req: HttpRequest<unknown>,\n  ) {\n    return this.requestAdapters\n      .filter(\n        adapter =>\n          !!adapter.requestDowngrade &&\n          compareVersion.lt(clusterVersion, adapter.clusterVersion) &&\n          (!adapter.httpMethods || adapter.httpMethods.includes(req.method)),\n      )\n      .sort((a, b) =>\n        compareVersion.lt(a.clusterVersion, b.clusterVersion) ? -1 : 1,\n      )\n      .reduceRight(\n        (nextReq, adapter) => adapter.requestDowngrade(nextReq),\n        req,\n      );\n  }\n\n  private executeRequestBodyDowngrade(\n    clusterVersion: string,\n    httpMethod: string,\n    body: unknown,\n  ) {\n    return this.requestAdapters\n      .filter(\n        adapter =>\n          !!adapter.bodyDowngrade &&\n          compareVersion.lt(clusterVersion, adapter.clusterVersion) &&\n          (adapter.httpMethods || ['POST', 'PUT', 'PATCH']).includes(\n            httpMethod,\n          ),\n      )\n      .sort((a, b) =>\n        compareVersion.lt(a.clusterVersion, b.clusterVersion) ? -1 : 1,\n      )\n      .reduceRight(\n        (nextBody, adapter) => adapter.bodyDowngrade(nextBody),\n        body,\n      );\n  }\n\n  private executeResponseBodyUpgrade(\n    clusterVersion: string,\n    httpMethod: string,\n    body: unknown,\n  ): unknown {\n    return this.responseAdapters\n      .filter(\n        adapter =>\n          compareVersion.lt(clusterVersion, adapter.clusterVersion) &&\n          (adapter.httpMethods || ['GET', 'POST', 'PUT', 'PATCH']).includes(\n            httpMethod,\n          ),\n      )\n      .sort((a, b) =>\n        compareVersion.lt(a.clusterVersion, b.clusterVersion) ? -1 : 1,\n      )\n      .reduce((nextBody, adapter) => adapter.bodyUpgrade(nextBody), body);\n  }\n}\n\ninterface Adapter {\n  clusterVersion: string;\n  httpMethods?: string[];\n}\n\nexport interface ResponseAdapter extends Adapter {\n  bodyUpgrade: (body: unknown) => unknown;\n}\n\nexport interface RequestAdapter extends Adapter {\n  bodyDowngrade?: (body: unknown) => unknown;\n  requestDowngrade?: (req: HttpRequest<unknown>) => HttpRequest<unknown>;\n}\n\nexport interface MatchResult {\n  matched: boolean;\n  cluster?: string;\n}\n\nexport function k8sApiMatcher(resourceType: string | K8sResourceDefinition) {\n  const resourceDefinitions = inject(TOKEN_RESOURCE_DEFINITIONS);\n  const define =\n    typeof resourceType === 'string'\n      ? resourceDefinitions[resourceType]\n      : resourceType;\n\n  const { apiGroup, apiVersion, type } = define;\n\n  if (!define) {\n    throw new TypeError(`Resource type '${resourceType}' is not defined`);\n  }\n\n  return (url: string) => {\n    const reg = new RegExp(\n      `/kubernetes/([^/]+)/apis/${apiGroup}/${apiVersion}/(?:namespaces/[^/]+/)?${type}`,\n    );\n    const matched = url.match(reg);\n\n    return matched\n      ? {\n          matched: true,\n          cluster: matched[1],\n        }\n      : { matched: false };\n  };\n}\n\nexport function k8sResourceOrList(\n  mapper: (res: KubernetesResource) => KubernetesResource,\n) {\n  return (res: KubernetesResource | KubernetesResourceList) => {\n    if (isK8SResourceList(res)) {\n      return {\n        ...res,\n        items: res.items.map(mapper),\n      };\n    }\n    return mapper(res);\n  };\n}\n\nfunction isK8SResourceList(\n  res: KubernetesResource | KubernetesResourceList,\n): res is KubernetesResourceList {\n  return 'items' in res && Array.isArray(res.items);\n}\n\nfunction isHttpDownloadProgressEvent<T = unknown>(\n  event: HttpEvent<T>,\n): event is HttpDownloadProgressEvent {\n  return event.type === HttpEventType.DownloadProgress;\n}\n"]}