1 |
- (window.webpackJsonp=window.webpackJsonp||[]).push([[182],{511:function(s,t,a){"use strict";a.r(t);var n=a(3),r=Object(n.a)({},(function(){var s=this,t=s._self._c;return t("ContentSlotsDistributor",{attrs:{"slot-key":s.$parent.slotKey}},[t("h1",{attrs:{id:"错误信息增强"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#错误信息增强"}},[s._v("#")]),s._v(" 错误信息增强")]),s._v(" "),t("h2",{attrs:{id:"需求分析"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#需求分析"}},[s._v("#")]),s._v(" 需求分析")]),s._v(" "),t("p",[s._v("上一节课我们已经捕获了几类 AJAX 的错误,但是对于错误信息提供的非常有限,我们希望对外提供的信息不仅仅包含错误文本信息,还包括了请求对象配置 "),t("code",[s._v("config")]),s._v(",错误代码 "),t("code",[s._v("code")]),s._v(","),t("code",[s._v("XMLHttpRequest")]),s._v(" 对象实例 "),t("code",[s._v("request")]),s._v("以及自定义响应对象 "),t("code",[s._v("response")]),s._v("。")]),s._v(" "),t("div",{staticClass:"language-typescript line-numbers-mode"},[t("pre",{pre:!0,attrs:{class:"language-typescript"}},[t("code",[t("span",{pre:!0,attrs:{class:"token function"}},[s._v("axios")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n method"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'get'")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n url"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'/error/timeout'")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n timeout"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token number"}},[s._v("2000")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("then")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("res"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("res"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("catch")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosError"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("message"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("request"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("code"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n")])]),s._v(" "),t("div",{staticClass:"line-numbers-wrapper"},[t("span",{staticClass:"line-number"},[s._v("1")]),t("br"),t("span",{staticClass:"line-number"},[s._v("2")]),t("br"),t("span",{staticClass:"line-number"},[s._v("3")]),t("br"),t("span",{staticClass:"line-number"},[s._v("4")]),t("br"),t("span",{staticClass:"line-number"},[s._v("5")]),t("br"),t("span",{staticClass:"line-number"},[s._v("6")]),t("br"),t("span",{staticClass:"line-number"},[s._v("7")]),t("br"),t("span",{staticClass:"line-number"},[s._v("8")]),t("br"),t("span",{staticClass:"line-number"},[s._v("9")]),t("br"),t("span",{staticClass:"line-number"},[s._v("10")]),t("br"),t("span",{staticClass:"line-number"},[s._v("11")]),t("br")])]),t("p",[s._v("这样对于应用方来说,他们就可以捕获到这些错误的详细信息,做进一步的处理。")]),s._v(" "),t("p",[s._v("那么接下来,我们就来对错误信息做增强。")]),s._v(" "),t("h2",{attrs:{id:"创建-axioserror-类"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#创建-axioserror-类"}},[s._v("#")]),s._v(" 创建 AxiosError 类")]),s._v(" "),t("p",[s._v("我们先来定义 "),t("code",[s._v("AxiosError")]),s._v(" 类型接口,用于外部使用。")]),s._v(" "),t("p",[t("code",[s._v("types/index.ts")]),s._v(":")]),s._v(" "),t("div",{staticClass:"language-typescript line-numbers-mode"},[t("pre",{pre:!0,attrs:{class:"language-typescript"}},[t("code",[t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("export")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("interface")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("AxiosError")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("extends")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Error")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosRequestConfig\n code"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("string")]),s._v("\n request"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("any")]),s._v("\n response"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosResponse\n isAxiosError"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("boolean")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n")])]),s._v(" "),t("div",{staticClass:"line-numbers-wrapper"},[t("span",{staticClass:"line-number"},[s._v("1")]),t("br"),t("span",{staticClass:"line-number"},[s._v("2")]),t("br"),t("span",{staticClass:"line-number"},[s._v("3")]),t("br"),t("span",{staticClass:"line-number"},[s._v("4")]),t("br"),t("span",{staticClass:"line-number"},[s._v("5")]),t("br"),t("span",{staticClass:"line-number"},[s._v("6")]),t("br"),t("span",{staticClass:"line-number"},[s._v("7")]),t("br")])]),t("p",[s._v("接着我们创建 "),t("code",[s._v("error.ts")]),s._v(" 文件,然后实现 "),t("code",[s._v("AxiosError")]),s._v(" 类,它是继承于 "),t("code",[s._v("Error")]),s._v(" 类。")]),s._v(" "),t("p",[t("code",[s._v("helpers/error.ts")]),s._v(":")]),s._v(" "),t("div",{staticClass:"language-typescript line-numbers-mode"},[t("pre",{pre:!0,attrs:{class:"language-typescript"}},[t("code",[t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("import")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" AxiosRequestConfig"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" AxiosResponse "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("from")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'../types'")]),s._v("\n\n"),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("export")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("class")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("AxiosError")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("extends")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("Error")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n isAxiosError"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("boolean")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosRequestConfig\n code"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("string")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("|")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),s._v("\n request"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("any")]),s._v("\n response"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosResponse\n\n "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("constructor")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("\n message"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("string")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosRequestConfig"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n code"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("string")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("|")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n request"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("any")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n response"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosResponse\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("super")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("message"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("config "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" config\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("code "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" code\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("request "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" request\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("response "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" response\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("isAxiosError "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token boolean"}},[s._v("true")]),s._v("\n\n Object"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("setPrototypeOf")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("this")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" AxiosError"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("prototype"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n\n"),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("export")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("createError")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("\n message"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("string")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosRequestConfig"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n code"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("string")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("|")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n request"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("any")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n response"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("?")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosResponse\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosError "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("const")]),s._v(" error "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("new")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token class-name"}},[s._v("AxiosError")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("message"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" config"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" code"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" request"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" response"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("return")]),s._v(" error\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n")])]),s._v(" "),t("div",{staticClass:"line-numbers-wrapper"},[t("span",{staticClass:"line-number"},[s._v("1")]),t("br"),t("span",{staticClass:"line-number"},[s._v("2")]),t("br"),t("span",{staticClass:"line-number"},[s._v("3")]),t("br"),t("span",{staticClass:"line-number"},[s._v("4")]),t("br"),t("span",{staticClass:"line-number"},[s._v("5")]),t("br"),t("span",{staticClass:"line-number"},[s._v("6")]),t("br"),t("span",{staticClass:"line-number"},[s._v("7")]),t("br"),t("span",{staticClass:"line-number"},[s._v("8")]),t("br"),t("span",{staticClass:"line-number"},[s._v("9")]),t("br"),t("span",{staticClass:"line-number"},[s._v("10")]),t("br"),t("span",{staticClass:"line-number"},[s._v("11")]),t("br"),t("span",{staticClass:"line-number"},[s._v("12")]),t("br"),t("span",{staticClass:"line-number"},[s._v("13")]),t("br"),t("span",{staticClass:"line-number"},[s._v("14")]),t("br"),t("span",{staticClass:"line-number"},[s._v("15")]),t("br"),t("span",{staticClass:"line-number"},[s._v("16")]),t("br"),t("span",{staticClass:"line-number"},[s._v("17")]),t("br"),t("span",{staticClass:"line-number"},[s._v("18")]),t("br"),t("span",{staticClass:"line-number"},[s._v("19")]),t("br"),t("span",{staticClass:"line-number"},[s._v("20")]),t("br"),t("span",{staticClass:"line-number"},[s._v("21")]),t("br"),t("span",{staticClass:"line-number"},[s._v("22")]),t("br"),t("span",{staticClass:"line-number"},[s._v("23")]),t("br"),t("span",{staticClass:"line-number"},[s._v("24")]),t("br"),t("span",{staticClass:"line-number"},[s._v("25")]),t("br"),t("span",{staticClass:"line-number"},[s._v("26")]),t("br"),t("span",{staticClass:"line-number"},[s._v("27")]),t("br"),t("span",{staticClass:"line-number"},[s._v("28")]),t("br"),t("span",{staticClass:"line-number"},[s._v("29")]),t("br"),t("span",{staticClass:"line-number"},[s._v("30")]),t("br"),t("span",{staticClass:"line-number"},[s._v("31")]),t("br"),t("span",{staticClass:"line-number"},[s._v("32")]),t("br"),t("span",{staticClass:"line-number"},[s._v("33")]),t("br"),t("span",{staticClass:"line-number"},[s._v("34")]),t("br"),t("span",{staticClass:"line-number"},[s._v("35")]),t("br"),t("span",{staticClass:"line-number"},[s._v("36")]),t("br"),t("span",{staticClass:"line-number"},[s._v("37")]),t("br"),t("span",{staticClass:"line-number"},[s._v("38")]),t("br"),t("span",{staticClass:"line-number"},[s._v("39")]),t("br")])]),t("p",[t("code",[s._v("AxiosError")]),s._v(" 继承于 "),t("code",[s._v("Error")]),s._v(" 类,添加了一些自己的属性:"),t("code",[s._v("config")]),s._v("、"),t("code",[s._v("code")]),s._v("、"),t("code",[s._v("request")]),s._v("、"),t("code",[s._v("response")]),s._v("、"),t("code",[s._v("isAxiosError")]),s._v(" 等属性。这里要注意一点,我们使用了 "),t("code",[s._v("Object.setPrototypeOf(this, AxiosError.prototype)")]),s._v(",这段代码的目的是为了解决 TypeScript 继承一些内置对象的时候的坑,"),t("a",{attrs:{href:"https://github.com/Microsoft/TypeScript-wiki/blob/master/Breaking-Changes.md#extending-built-ins-like-error-array-and-map-may-no-longer-work",target:"_blank",rel:"noopener noreferrer"}},[s._v("参考"),t("OutboundLink")],1),s._v("。")]),s._v(" "),t("p",[s._v("另外,为了方便使用,我们对外暴露了一个 "),t("code",[s._v("createError")]),s._v(" 的工厂方法。")]),s._v(" "),t("h2",{attrs:{id:"createerror-方法应用"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#createerror-方法应用"}},[s._v("#")]),s._v(" createError 方法应用")]),s._v(" "),t("p",[s._v("修改关于错误对象创建部分的逻辑,如下:")]),s._v(" "),t("p",[t("code",[s._v("xhr.ts")]),s._v(":")]),s._v(" "),t("div",{staticClass:"language-typescript line-numbers-mode"},[t("pre",{pre:!0,attrs:{class:"language-typescript"}},[t("code",[t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("import")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" createError "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("from")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'./helpers/error'")]),s._v("\n\nrequest"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function-variable function"}},[s._v("onerror")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("handleError")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("reject")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("createError")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'Network Error'")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n request\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n\nrequest"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function-variable function"}},[s._v("ontimeout")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("handleTimeout")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("reject")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("createError")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token template-string"}},[t("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[s._v("`")]),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("Timeout of ")]),t("span",{pre:!0,attrs:{class:"token interpolation"}},[t("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[s._v("${")]),s._v("config"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("timeout"),t("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[s._v("}")])]),t("span",{pre:!0,attrs:{class:"token string"}},[s._v(" ms exceeded")]),t("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[s._v("`")])]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'ECONNABORTED'")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n request\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n\n"),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("function")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("handleResponse")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("response"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosResponse"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("if")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("response"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("status "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(">=")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token number"}},[s._v("200")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("&&")]),s._v(" response"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("status "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("<")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token number"}},[s._v("300")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("resolve")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("response"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("else")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("reject")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("createError")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token template-string"}},[t("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[s._v("`")]),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("Request failed with status code ")]),t("span",{pre:!0,attrs:{class:"token interpolation"}},[t("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[s._v("${")]),s._v("response"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("status"),t("span",{pre:!0,attrs:{class:"token interpolation-punctuation punctuation"}},[s._v("}")])]),t("span",{pre:!0,attrs:{class:"token template-punctuation string"}},[s._v("`")])]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n config"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("null")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n request"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n response\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v("\n")])]),s._v(" "),t("div",{staticClass:"line-numbers-wrapper"},[t("span",{staticClass:"line-number"},[s._v("1")]),t("br"),t("span",{staticClass:"line-number"},[s._v("2")]),t("br"),t("span",{staticClass:"line-number"},[s._v("3")]),t("br"),t("span",{staticClass:"line-number"},[s._v("4")]),t("br"),t("span",{staticClass:"line-number"},[s._v("5")]),t("br"),t("span",{staticClass:"line-number"},[s._v("6")]),t("br"),t("span",{staticClass:"line-number"},[s._v("7")]),t("br"),t("span",{staticClass:"line-number"},[s._v("8")]),t("br"),t("span",{staticClass:"line-number"},[s._v("9")]),t("br"),t("span",{staticClass:"line-number"},[s._v("10")]),t("br"),t("span",{staticClass:"line-number"},[s._v("11")]),t("br"),t("span",{staticClass:"line-number"},[s._v("12")]),t("br"),t("span",{staticClass:"line-number"},[s._v("13")]),t("br"),t("span",{staticClass:"line-number"},[s._v("14")]),t("br"),t("span",{staticClass:"line-number"},[s._v("15")]),t("br"),t("span",{staticClass:"line-number"},[s._v("16")]),t("br"),t("span",{staticClass:"line-number"},[s._v("17")]),t("br"),t("span",{staticClass:"line-number"},[s._v("18")]),t("br"),t("span",{staticClass:"line-number"},[s._v("19")]),t("br"),t("span",{staticClass:"line-number"},[s._v("20")]),t("br"),t("span",{staticClass:"line-number"},[s._v("21")]),t("br"),t("span",{staticClass:"line-number"},[s._v("22")]),t("br"),t("span",{staticClass:"line-number"},[s._v("23")]),t("br"),t("span",{staticClass:"line-number"},[s._v("24")]),t("br"),t("span",{staticClass:"line-number"},[s._v("25")]),t("br"),t("span",{staticClass:"line-number"},[s._v("26")]),t("br"),t("span",{staticClass:"line-number"},[s._v("27")]),t("br"),t("span",{staticClass:"line-number"},[s._v("28")]),t("br"),t("span",{staticClass:"line-number"},[s._v("29")]),t("br"),t("span",{staticClass:"line-number"},[s._v("30")]),t("br"),t("span",{staticClass:"line-number"},[s._v("31")]),t("br"),t("span",{staticClass:"line-number"},[s._v("32")]),t("br"),t("span",{staticClass:"line-number"},[s._v("33")]),t("br")])]),t("h2",{attrs:{id:"导出类型定义"}},[t("a",{staticClass:"header-anchor",attrs:{href:"#导出类型定义"}},[s._v("#")]),s._v(" 导出类型定义")]),s._v(" "),t("p",[s._v("在 demo 中,TypeScript 并不能把 "),t("code",[s._v("e")]),s._v(" 参数推断为 "),t("code",[s._v("AxiosError")]),s._v(" 类型,于是我们需要手动指明类型,为了让外部应用能引入 "),t("code",[s._v("AxiosError")]),s._v(" 类型,我们也需要把它们导出。")]),s._v(" "),t("p",[s._v("我们创建 "),t("code",[s._v("axios.ts")]),s._v(" 文件,把之前的 "),t("code",[s._v("index.ts")]),s._v(" 的代码拷贝过去,然后修改 "),t("code",[s._v("index.ts")]),s._v(" 的代码。")]),s._v(" "),t("p",[t("code",[s._v("index.ts")]),s._v(":")]),s._v(" "),t("div",{staticClass:"language-typescript line-numbers-mode"},[t("pre",{pre:!0,attrs:{class:"language-typescript"}},[t("code",[t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("import")]),s._v(" axios "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("from")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'./axios'")]),s._v("\n\n"),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("export")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("*")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("from")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'./types'")]),s._v("\n\n"),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("export")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("default")]),s._v(" axios\n")])]),s._v(" "),t("div",{staticClass:"line-numbers-wrapper"},[t("span",{staticClass:"line-number"},[s._v("1")]),t("br"),t("span",{staticClass:"line-number"},[s._v("2")]),t("br"),t("span",{staticClass:"line-number"},[s._v("3")]),t("br"),t("span",{staticClass:"line-number"},[s._v("4")]),t("br"),t("span",{staticClass:"line-number"},[s._v("5")]),t("br")])]),t("p",[s._v("这样我们在 demo 中就可以引入 "),t("code",[s._v("AxiosError")]),s._v(" 类型了。")]),s._v(" "),t("p",[t("code",[s._v("examples/error/app.ts")]),s._v(":")]),s._v(" "),t("div",{staticClass:"language-typescript line-numbers-mode"},[t("pre",{pre:!0,attrs:{class:"language-typescript"}},[t("code",[t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("import")]),s._v(" axios"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v(" AxiosError "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token keyword"}},[s._v("from")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'../../src/index'")]),s._v("\n\n"),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("axios")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n method"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'get'")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n url"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token string"}},[s._v("'/error/timeout'")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(",")]),s._v("\n timeout"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token number"}},[s._v("2000")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("then")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("res"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("res"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("catch")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v(":")]),s._v(" AxiosError"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token operator"}},[s._v("=>")]),s._v(" "),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("{")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("message"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n "),t("span",{pre:!0,attrs:{class:"token builtin"}},[s._v("console")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),t("span",{pre:!0,attrs:{class:"token function"}},[s._v("log")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("(")]),s._v("e"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(".")]),s._v("code"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n"),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v("}")]),t("span",{pre:!0,attrs:{class:"token punctuation"}},[s._v(")")]),s._v("\n")])]),s._v(" "),t("div",{staticClass:"line-numbers-wrapper"},[t("span",{staticClass:"line-number"},[s._v("1")]),t("br"),t("span",{staticClass:"line-number"},[s._v("2")]),t("br"),t("span",{staticClass:"line-number"},[s._v("3")]),t("br"),t("span",{staticClass:"line-number"},[s._v("4")]),t("br"),t("span",{staticClass:"line-number"},[s._v("5")]),t("br"),t("span",{staticClass:"line-number"},[s._v("6")]),t("br"),t("span",{staticClass:"line-number"},[s._v("7")]),t("br"),t("span",{staticClass:"line-number"},[s._v("8")]),t("br"),t("span",{staticClass:"line-number"},[s._v("9")]),t("br"),t("span",{staticClass:"line-number"},[s._v("10")]),t("br"),t("span",{staticClass:"line-number"},[s._v("11")]),t("br"),t("span",{staticClass:"line-number"},[s._v("12")]),t("br")])]),t("p",[s._v("至此,我们关于 "),t("code",[s._v("ts-axios")]),s._v(" 的异常处理逻辑就告一段落。下面的章节,我们会对 "),t("code",[s._v("ts-axios")]),s._v(" 的接口做扩展,让它提供更多好用和方便的 API。")])])}),[],!1,null,null,null);t.default=r.exports}}]);
|