{"id":39638,"date":"2023-03-26T01:53:17","date_gmt":"2023-11-06T01:36:27","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/httpinterceptor%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e7%ac%94%e8%ae%b0\/"},"modified":"2024-04-29T20:33:46","modified_gmt":"2024-04-29T12:33:46","slug":"httpinterceptor%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e7%ac%94%e8%ae%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/httpinterceptor%e7%9a%84%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b%e7%ac%94%e8%ae%b0\/","title":{"rendered":"HttpInterceptor\u7684\u4f7f\u7528\u793a\u4f8b\u7b14\u8bb0"},"content":{"rendered":"

\u4f7f\u7528Angular\u7684HttpInterceptor\u65f6\u7684\u6ce8\u610f\u4e8b\u9879<\/p>\n

\u7f51\u7edc\u62e6\u622a\u5668<\/h1>\n

\u5728\u53d1\u9001\u8bf7\u6c42\u4e4b\u524d\u6216\u6536\u5230\u54cd\u5e94\u4e4b\u540e\uff0c\u53ef\u4ee5\u6dfb\u52a0\u901a\u7528\u5904\u7406\u7684\u4e1c\u897f\u3002<\/p>\n

\u8bf7\u67e5\u9605\u5b98\u65b9\u6587\u4ef6\u4ee5\u83b7\u53d6\u8be6\u7ec6\u4fe1\u606f\uff08\u82f1\u6587\uff09\u3002
\nhttps:\/\/angular.io\/guide\/http#advanced-usage<\/p>\n

@ponday \u3055\u3093\u306e\u8a18\u4e8b\u306f\u3001\u65e5\u672c\u8a9e\u3067\u66f8\u304b\u308c\u3066\u3044\u3066\u7406\u89e3\u3057\u3084\u3059\u3044\u3067\u3059\u3002\u30e1\u30e2\u3067\u306f\u3001Angular 4.3\u3067\u8ffd\u52a0\u3055\u308c\u305fHttpClientModule\u306b\u3064\u3044\u3066\u8ff0\u3079\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u5171\u540c\u8bf7\u6c42\u8bbe\u7f6e<\/h1>\n

\u5982\u679c\u8981\u66f4\u6539\u6807\u5934\u6216\u4f7f\u7528cookie\uff0c\u53ef\u4ee5\u514b\u9686\u5e76\u8986\u76d6\u8bf7\u6c42\u3002<\/p>\n

import<\/span> {<\/span> Injectable<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> HttpEvent<\/span>,<\/span> HttpInterceptor<\/span>,<\/span> HttpHandler<\/span>,<\/span> HttpRequest<\/span> }<\/span> from<\/span> '<\/span>@angular\/common\/http<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Observable<\/span> }<\/span> from<\/span> '<\/span>rxjs<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Injectable<\/span>()<\/span>\r\nexport<\/span> class<\/span> RequestInterceptor<\/span> implements<\/span> HttpInterceptor<\/span> {<\/span>\r\n  private<\/span> baseUrl<\/span> =<\/span> '<\/span>http:\/\/localhost:8080\/sample-app<\/span>'<\/span>;<\/span>\r\n\r\n  constructor<\/span>()<\/span> {<\/span> }<\/span>\r\n\r\n  intercept<\/span>(<\/span>request<\/span>:<\/span> HttpRequest<\/span><<\/span>any<\/span>><\/span>,<\/span> next<\/span>:<\/span> HttpHandler<\/span>):<\/span> Observable<\/span><<\/span>HttpEvent<\/span><<\/span>any<\/span>>><\/span> {<\/span>\r\n    \/\/ '\/api'\u304b\u3089\u59cb\u307e\u308b\u30ea\u30af\u30a8\u30b9\u30c8<\/span>\r\n    if<\/span> (<\/span>request<\/span>.<\/span>url<\/span>.<\/span>match<\/span>(<\/span>\/^<\/span>\\\/<\/span>api<\/span>\\\/<\/span>\/<\/span>))<\/span> {<\/span>\r\n      const<\/span> req<\/span> =<\/span> request<\/span>.<\/span>clone<\/span>({<\/span>\r\n        url<\/span>:<\/span> `<\/span>${<\/span>this<\/span>.<\/span>baseUrl<\/span>}<\/span>\/<\/span>${<\/span>request<\/span>.<\/span>url<\/span>}<\/span>`<\/span>,<\/span>  \/\/ \u63a5\u7d9a\u5148URL\u4ed8\u52a0<\/span>\r\n        withCredentials<\/span>:<\/span> true<\/span>,<\/span>                  \/\/ Cookie\u6709\u52b9<\/span>\r\n        setHeaders<\/span>:<\/span> {<\/span>                           \/\/ \u30d8\u30c3\u30c0\u30fc\u66f8\u304d\u63db\u3048<\/span>\r\n          '<\/span>Content-Type<\/span>'<\/span>:<\/span> '<\/span>application\/json<\/span>'<\/span>,<\/span>\r\n          '<\/span>X-Requested-With<\/span>'<\/span>:<\/span> '<\/span>XMLHttpRequest<\/span>'<\/span>,<\/span>\r\n        },<\/span>\r\n      });<\/span>\r\n      return<\/span> next<\/span>.<\/span>handle<\/span>(<\/span>req<\/span>);<\/span>\r\n    }<\/span>\r\n    return<\/span> next<\/span>.<\/span>handle<\/span>(<\/span>request<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c06\u6d4b\u8bd5\u4e0e\u670d\u52a1\u7684URL\u8bbe\u7f6e\u5206\u79bb\uff0c\u53ef\u4ee5\u4f7f\u6d4b\u8bd5\u7f16\u5199\u66f4\u5bb9\u6613\u3002<\/p>\n
\u5173\u4e8eURL\u7684\u66f4\u6539\uff0c\u53ef\u4ee5\u4f7f\u7528Proxy\u800c\u4e0d\u662fHttpInterceptor\u3002
\nhttps:\/\/angular.io\/guide\/build#proxying-to-a-backend-server<\/p>\n
\u81ea\u52a8\u5316\u663e\u793a\u9519\u8bef\u6d88\u606f<\/h1>\n
\u5f53\u65e0\u6cd5\u6bcf\u6b21\u624b\u52a8\u6355\u6349\u9519\u8bef\u5e76\u663e\u793a\u6d88\u606f\u65f6\u3002<\/p>\n
import<\/span> {<\/span> Injectable<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> HttpEvent<\/span>,<\/span> HttpInterceptor<\/span>,<\/span> HttpHandler<\/span>,<\/span> HttpRequest<\/span> }<\/span> from<\/span> '<\/span>@angular\/common\/http<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> MatSnackBar<\/span> }<\/span> from<\/span> '<\/span>@angular\/material<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Observable<\/span>,<\/span> throwError<\/span> }<\/span> from<\/span> '<\/span>rxjs<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> catchError<\/span> }<\/span> from<\/span> '<\/span>rxjs\/operators<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Injectable<\/span>()<\/span>\r\nexport<\/span> class<\/span> ErrorInterceptor<\/span> implements<\/span> HttpInterceptor<\/span> {<\/span>\r\n\r\n  constructor<\/span>(<\/span>private<\/span> toastService<\/span>:<\/span> MatSnackBar<\/span>)<\/span> {<\/span> }<\/span>\r\n\r\n  intercept<\/span>(<\/span>request<\/span>:<\/span> HttpRequest<\/span><<\/span>any<\/span>><\/span>,<\/span> next<\/span>:<\/span> HttpHandler<\/span>):<\/span> Observable<\/span><<\/span>HttpEvent<\/span><<\/span>any<\/span>>><\/span> {<\/span>\r\n    const<\/span> req<\/span> =<\/span> request<\/span>.<\/span>clone<\/span>();<\/span>\r\n    return<\/span> next<\/span>.<\/span>handle<\/span>(<\/span>req<\/span>).<\/span>pipe<\/span>(<\/span>\r\n      catchError<\/span>(<\/span>res<\/span> =><\/span> {<\/span>\r\n        switch<\/span> (<\/span>res<\/span>.<\/span>status<\/span>)<\/span> {<\/span>\r\n          case<\/span> 400<\/span>:<\/span>\r\n          case<\/span> 401<\/span>:<\/span>\r\n          case<\/span> 403<\/span>:<\/span>\r\n          case<\/span> 404<\/span>:<\/span>\r\n          case<\/span> 500<\/span>:<\/span>\r\n            \/\/ {\"errors\":[{\"message\":\"Sorry, that page does not exist\",\"code\":34}]}<\/span>\r\n            const<\/span> errors<\/span> =<\/span> JSON<\/span>.<\/span>parse<\/span>(<\/span>res<\/span>.<\/span>errors<\/span>);<\/span>\r\n            if<\/span> (<\/span>errors<\/span>)<\/span> {<\/span>\r\n              errors<\/span>.<\/span>map<\/span>(<\/span>e<\/span> =><\/span> {<\/span>\r\n                this<\/span>.<\/span>toastService<\/span>.<\/span>open<\/span>(<\/span>`<\/span>${<\/span>e<\/span>.<\/span>code<\/span>}<\/span>: <\/span>${<\/span>e<\/span>.<\/span>message<\/span>}<\/span>`<\/span>);<\/span>\r\n              });<\/span>\r\n            }<\/span>\r\n            break<\/span>;<\/span>\r\n          default<\/span>:<\/span>\r\n            break<\/span>;<\/span>\r\n        }<\/span>\r\n        return<\/span> throwError<\/span>(<\/span>res<\/span>);<\/span>\r\n      })<\/span>\r\n    );<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u81ea\u5236\u9762\u5305\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u65e9\u9910\u9009\u9879\u3002<\/p>\n
\u81ea\u52a8\u663e\u793a\u8fdb\u5ea6\u6761<\/h1>\n
\u7531\u4e8e\u624b\u52a8\u63a7\u5236\u8fdb\u5ea6\u6761\u7684\u663e\u793a\/\u9690\u85cf\u76f8\u5bf9\u7e41\u7410\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u62e6\u622a\u5668\u81ea\u52a8\u5316\u8fd9\u4e2a\u8fc7\u7a0b\u3002<\/p>\n
import<\/span> {<\/span> Injectable<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> HttpEvent<\/span>,<\/span> HttpEventType<\/span>,<\/span> HttpInterceptor<\/span>,<\/span> HttpHandler<\/span>,<\/span> HttpRequest<\/span> }<\/span> from<\/span> '<\/span>@angular\/common\/http<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Observable<\/span> }<\/span> from<\/span> '<\/span>rxjs<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> tap<\/span>,<\/span> finalize<\/span> }<\/span> from<\/span> '<\/span>rxjs\/operators<\/span>'<\/span>;<\/span>\r\n\r\n\/\/ \u30b5\u30fc\u30d3\u30b9\u306f\u5225\u9014\u7528\u610f<\/span>\r\nimport<\/span> {<\/span> ProgressbarService<\/span>}<\/span> from<\/span> '<\/span>.\/progressbar.service<\/span>'<\/span>;<\/span>\r\n\r\n@<\/span>Injectable<\/span>()<\/span>\r\nexport<\/span> class<\/span> ProgressbarInterceptor<\/span> implements<\/span> HttpInterceptor<\/span> {<\/span>\r\n\r\n  constructor<\/span>(<\/span>private<\/span> progressbar<\/span>:<\/span> ProgressbarService<\/span>)<\/span> {<\/span> }<\/span>\r\n\r\n  \/\/ \u2193\u53c2\u8003<\/span>\r\n  \/\/ https:\/\/github.com\/MurhafSousli\/ngx-progressbar\/blob\/master\/src\/services\/interceptor.provider.ts<\/span>\r\n  intercept<\/span>(<\/span>request<\/span>:<\/span> HttpRequest<\/span><<\/span>any<\/span>><\/span>,<\/span> next<\/span>:<\/span> HttpHandler<\/span>):<\/span> Observable<\/span><<\/span>HttpEvent<\/span><<\/span>any<\/span>>><\/span> {<\/span>\r\n    this<\/span>.<\/span>progressbar<\/span>.<\/span>show<\/span>();<\/span>\r\n    return<\/span> next<\/span>.<\/span>handle<\/span>(<\/span>request<\/span>).<\/span>pipe<\/span>(<\/span>\r\n      \/\/tap(event => {<\/span>\r\n      \/\/  if (event.type === HttpEventType.UploadProgress) {<\/span>\r\n      \/\/    const percent = Math.round(100 * event.loaded \/ event.total);<\/span>\r\n      \/\/    this.progressbar.set(percent);<\/span>\r\n      \/\/  }<\/span>\r\n      \/\/}),<\/span>\r\n      finalize<\/span>(()<\/span> =><\/span> {<\/span>\r\n        this<\/span>.<\/span>progressbar<\/span>.<\/span>hide<\/span>();<\/span>\r\n      })<\/span>\r\n    );<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
( \u00b4\u30fc\uff40) .oO(\u867d\u7136\u65cb\u8f6c\u5668\u4e5f\u53ef\u4ee5\u505a\u540c\u6837\u7684\u4e8b\u60c5\uff0c\u4f46\u5c4f\u5e55\u53ef\u80fd\u4f1a\u95ea\u70c1\uff09\u203b \u89e3\u51b3\u65b9\u6cd5\u8bf7\u53c2\u8003\u8bc4\u8bba\u3002<\/p>\n
\u5c06ISO-8601\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u65e5\u671f\u7c7b\u578b<\/h1>\n
\u5982\u679c\u8fd4\u56de\u7684\u54cd\u5e94\u4ee5\u5b57\u7b26\u4e32\u5f62\u5f0f\u8fd4\u56de\u65e5\u671f\uff0c\u76f4\u63a5\u4f7f\u7528getFullYear\u4e4b\u7c7b\u7684\u51fd\u6570\u662f\u65e0\u6cd5\u4f7f\u7528\u7684\uff0c\u8fd9\u6837\u5f88\u9ebb\u70e6…
\n\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u8ba9\u6211\u4eec\u5728\u62e6\u622a\u5668\u4e2d\u63d0\u53d6\u5b57\u7b26\u4e32\u5e76\u81ea\u52a8\u5c06\u5176\u8f6c\u6362\u4e3a\u65e5\u671f\u7c7b\u578b\u3002<\/p>\n
import<\/span> {<\/span> Injectable<\/span> }<\/span> from<\/span> '<\/span>@angular\/core<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> HttpEvent<\/span>,<\/span> HttpInterceptor<\/span>,<\/span> HttpHandler<\/span>,<\/span> HttpRequest<\/span>,<\/span> HttpResponse<\/span> }<\/span> from<\/span> '<\/span>@angular\/common\/http<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> Observable<\/span> }<\/span> from<\/span> '<\/span>rxjs<\/span>'<\/span>;<\/span>\r\nimport<\/span> {<\/span> tap<\/span> }<\/span> from<\/span> '<\/span>rxjs\/operators<\/span>'<\/span>;<\/span>\r\n\r\n\/**\r\n * \u5143\u30cd\u30bf\u306f\u2193\u306eAngularJS\u7528\u30a4\u30f3\u30bf\u30fc\u30bb\u30d7\u30bf\r\n * https:\/\/gist.github.com\/ScottGuymer\/9994dae637bb2055d58b\r\n *\/<\/span>\r\nconst<\/span> ISO_8601<\/span> =<\/span> \/^<\/span>\\d{4,5}<\/span>-<\/span>\\d\\d<\/span>-<\/span>\\d\\d<\/span>T<\/span>\\d\\d<\/span>:<\/span>\\d\\d<\/span>:<\/span>\\d\\d(\\.\\d<\/span>+<\/span>)?(([<\/span>+-<\/span>]\\d\\d<\/span>:<\/span>\\d\\d)<\/span>|Z<\/span>)?<\/span>$\/i<\/span>;<\/span>\r\nfunction<\/span> convertDateStringsToDates<\/span>(<\/span>input<\/span>:<\/span> any<\/span>)<\/span> {<\/span>\r\n  if<\/span> (<\/span>typeof<\/span> input<\/span> !==<\/span> '<\/span>object<\/span>'<\/span>)<\/span> {<\/span>\r\n    return<\/span> input<\/span>;<\/span>\r\n  }<\/span>\r\n  for<\/span> (<\/span>const<\/span> key<\/span> in<\/span> input<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>!<\/span>input<\/span>.<\/span>hasOwnProperty<\/span>(<\/span>key<\/span>))<\/span> {<\/span>\r\n      continue<\/span>;<\/span>\r\n    }<\/span>\r\n    const<\/span> value<\/span> =<\/span> input<\/span>[<\/span>key<\/span>];<\/span>\r\n    let<\/span> match<\/span>;<\/span>\r\n    if<\/span> (<\/span>typeof<\/span> value<\/span> ===<\/span> '<\/span>string<\/span>'<\/span> &&<\/span> (<\/span>match<\/span> =<\/span> value<\/span>.<\/span>match<\/span>(<\/span>ISO_8601<\/span>)))<\/span> {<\/span>\r\n      const<\/span> milliseconds<\/span> =<\/span> Date<\/span>.<\/span>parse<\/span>(<\/span>match<\/span>[<\/span>0<\/span>]);<\/span>\r\n      if<\/span> (<\/span>!<\/span>isNaN<\/span>(<\/span>milliseconds<\/span>))<\/span> {<\/span>\r\n        input<\/span>[<\/span>key<\/span>]<\/span> =<\/span> new<\/span> Date<\/span>(<\/span>milliseconds<\/span>);<\/span>\r\n      }<\/span>\r\n    }<\/span> else<\/span> if<\/span> (<\/span>typeof<\/span> value<\/span> ===<\/span> '<\/span>object<\/span>'<\/span>)<\/span> {<\/span>\r\n      convertDateStringsToDates<\/span>(<\/span>value<\/span>);<\/span>\r\n    }<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n@<\/span>Injectable<\/span>()<\/span>\r\nexport<\/span> class<\/span> DateInterceptor<\/span> implements<\/span> HttpInterceptor<\/span> {<\/span>\r\n\r\n  constructor<\/span>()<\/span> {<\/span> }<\/span>\r\n\r\n  intercept<\/span>(<\/span>request<\/span>:<\/span> HttpRequest<\/span><<\/span>any<\/span>><\/span>,<\/span> next<\/span>:<\/span> HttpHandler<\/span>):<\/span> Observable<\/span><<\/span>HttpEvent<\/span><<\/span>any<\/span>>><\/span> {<\/span>\r\n    const<\/span> req<\/span> =<\/span> request<\/span>.<\/span>clone<\/span>();<\/span>\r\n    return<\/span> next<\/span>.<\/span>handle<\/span>(<\/span>req<\/span>).<\/span>pipe<\/span>(<\/span>\r\n      tap<\/span>(<\/span>event<\/span> =><\/span> {<\/span>\r\n        if<\/span> (<\/span>event<\/span> instanceof<\/span> HttpResponse<\/span>)<\/span> {<\/span>\r\n          convertDateStringsToDates<\/span>(<\/span>event<\/span>.<\/span>body<\/span>);<\/span>\r\n        }<\/span>\r\n      })<\/span>\r\n    );<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
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