{"id":1624,"date":"2023-03-14T05:42:02","date_gmt":"2023-03-14T05:42:02","guid":{"rendered":"https:\/\/www.liutianfeng.com\/?p=1624"},"modified":"2023-11-07T07:16:05","modified_gmt":"2023-11-07T07:16:05","slug":"golang-http","status":"publish","type":"post","link":"https:\/\/www.liutianfeng.com\/?p=1624","title":{"rendered":"golang &#8211; http"},"content":{"rendered":"\n<p><\/p>\n\n\n<p>\u53c2\u8003\uff1a<a href=\"https:\/\/www.php.cn\/faq\/508196.html\">Golang\u4e2d\u5982\u4f55\u5b9e\u73b0GET\u8bf7\u6c42<\/a><\/p>\n<h3>1. \u666e\u901a\u793a\u4f8b\uff1a<\/h3>\n<pre class=\"pure-highlightjs\"><code class=\"\">package main\n\nimport (\n    \"fmt\"\n    \"log\"\n    \"net\/http\"\n)\n\ntype dolors float32\n\nfunc (d dolors) String() string {\n    return (fmt.Sprintf(\"$%.2f\", d))\n}\n\ntype database map[string]dolors\n\nfunc (db database) ServeHTTP(w http.ResponseWriter, req *http.Request) {\n    for item, price := range db {\n        fmt.Fprintf(w, \"%s: %s\\n\", item, price)\n    }\n}\n\nfunc main() {\n    db := database{\"Book\": 23, \"Shoes\": 222}\n    log.Fatal(http.ListenAndServe(\"localhost:8080\", db))\n}<\/code><\/pre>\n<h3>2. URI\u8def\u7531\uff1a<\/h3>\n<pre class=\"pure-highlightjs\"><code class=\"\">package main\n\nimport (\n    \"fmt\"\n    \"log\"\n    \"net\/http\"\n)\n\ntype dolors float32\n\nfunc (d dolors) String() string {\n    return (fmt.Sprintf(\"$%.2f\", d))\n}\n\ntype database map[string]dolors\n\nfunc (db database) ServeHTTP(w http.ResponseWriter, req *http.Request) {\n    switch req.URL.Path {\n    case \"\/list\":\n        for item, price := range db {\n            fmt.Fprintf(w, \"%s: %s\\n\", item, price)\n        }\n    case \"\/price\":\n        item := req.URL.Query().Get(\"item\")\n        price, ok := db[item]\n        if !ok {\n            w.WriteHeader(http.StatusNotFound) \/\/ 404\n            fmt.Fprintf(w, \"no such item: %q\\n\", item)\n            return\n        }\n        fmt.Fprintf(w, \"%s\\n\", price)\n    default:\n        w.WriteHeader(http.StatusNotFound) \/\/ 404\n        fmt.Fprintf(w, \"no such item: %q\\n\", req.URL)\n    }\n}\n\nfunc main() {\n    db := database{\"Book\": 23, \"Shoes\": 222}\n    log.Fatal(http.ListenAndServe(\"localhost:8080\", db))\n}\n\n\u8bbf\u95ee\uff1ahttp:\/\/localhost:8080\nno such item: \"\/\"\n\n\u8bbf\u95ee\uff1ahttp:\/\/localhost:8080\/price?item=Book\n$23.00\n\n\u8bbf\u95ee\uff1ahttp:\/\/localhost:8080\/list\nShoes: $222.00\nBook: $23.00<\/code><\/pre>\n<h3>3. ServeMux\u5b9e\u73b0<\/h3>\n<pre class=\"pure-highlightjs\"><code class=\"\">\/\/ \u6ca1\u6709DefaultServeMux\u7684\u8c03\u7528\nfunc main() {\n    db := database{\"Book\": 23, \"Shoes\": 222}\n    mux := http.NewServeMux()\n    \/\/ http.HandlerFunc\u8f6c\u6362\u666e\u901a\u51fd\u6570\u4e3ahttp.Handler\n    mux.Handle(\"\/list\", http.HandlerFunc(db.list))\n    mux.Handle(\"\/price\", http.HandlerFunc(db.price))\n    log.Fatal(http.ListenAndServe(\"localhost:8080\", mux))\n}\n\n\/\/ DefaultServeMux\u7684\u8c03\u7528\nfunc main() {\n    db := database{\"Book\": 23, \"Shoes\": 222}\n    http.HandleFunc(\"\/list\", db.list)\n    http.HandleFunc(\"\/price\", db.price)\n    \/\/ DefaultServeMux\u662f\u5168\u5c40\u7684ServeMux\u5b9e\u4f8b\uff0c\u4f5c\u4e3a\u670d\u52a1\u5668\u7684\u4e3b\u7a0b\u5e8f\uff0c\u4f20\u5165nil\u5373\u53ef\n    log.Fatal(http.ListenAndServe(\"localhost:8080\", nil))\n}\n\ntype dolors float32\n\nfunc (d dolors) String() string {\n    return (fmt.Sprintf(\"$%.2f\", d))\n}\n\ntype database map[string]dolors\n\nfunc (db database) list(w http.ResponseWriter, req *http.Request) {\n    for item, price := range db {\n        fmt.Fprintf(w, \"%s: %s\\n\", item, price)\n    }\n}\n\nfunc (db database) price(w http.ResponseWriter, req *http.Request) {\n    item := req.URL.Query().Get(\"item\")\n    price, ok := db[item]\n    if !ok {\n        w.WriteHeader(http.StatusNotFound)\n        fmt.Fprintf(w, \"No such item: %q\\n\", item)\n        return\n    }\n    fmt.Fprintf(w, \"%s\\n\", price)\n}\n\n\u8bbf\u95ee\uff1a\nhttp:\/\/localhost:8080\/hello\n404 page not found\n\nhttp:\/\/localhost:8080\/list\nBook: $23.00\nShoes: $222.00\n\nhttp:\/\/localhost:8080\/price?item=Book\n$23.00\n\nhttp:\/\/localhost:8080\/price?item=Lius\nNo such item: \"Lius\"<\/code><\/pre>\n<h3>4. HandlerFunc<\/h3>\n<pre class=\"pure-highlightjs\"><code class=\"\">package http\n\ntype HandlerFunc func(ResponseWriter, *Request)\n\/\/ The HandlerFunc type is an adapter to allow the use of ordinary functions as HTTP handlers. If f is a function with the appropriate signature, HandlerFunc(f) is a Handler that calls f.<br \/>\nfunc (f HandlerFunc) ServeHTTP(w ResponseWriter, r *Request) {\n    f(w, r)\n}<\/code><\/pre>\n<p>HandlerFunc\u6f14\u793a\u4e86Go\u8bed\u8a00\u63a5\u53e3\u673a\u5236\u7684\u4e00\u4e2a\u4e0d\u5e38\u7528\u7684\u7279\u6027\u3002<br \/>\u5b83\u4e0d\u4ec5\u662f\u4e00\u4e2a\u51fd\u6570\u7c7b\u578b\uff0c\u8fd8\u62e5\u6709\u81ea\u5df1\u7684\u65b9\u6cd5\uff0c\u4e5f\u6ee1\u8db3\u63a5\u53e3http.Handler\u3002<br \/>\u5b83\u7684ServeHTTP\u65b9\u6cd5\u5c31\u8c03\u7528\u51fd\u6570\u672c\u8eab\uff0c\u6240\u4ee5HandlerFunc\u5c31\u662f\u4e00\u4e2a\u8ba9\u51fd\u6570\u503c\u6ee1\u8db3\u63a5\u53e3\u7684\u4e00\u4e2a\u9002\u914d\u5668\uff0c\u51fd\u6570\u548c\u63a5\u53e3\u7684\u552f\u4e00\u65b9\u6cd5\u62e5\u6709\u540c\u6837\u7684\u7b7e\u540d\u3002<\/p>\n<p>\u00a0<\/p><p>\u8f6c\u8f7d\u8bf7\u6ce8\u660e\uff1a<a href=\"https:\/\/www.liutianfeng.com\">liutianfeng.com<\/a> &raquo; <a href=\"https:\/\/www.liutianfeng.com\/?p=1624\">golang &#8211; http<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u53c2\u8003\uff1aGolang\u4e2d\u5982\u4f55\u5b9e\u73b0GET\u8bf7\u6c42 1. \u666e\u901a\u793a\u4f8b\uff1a package main import ( &#8220;fmt [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[74],"tags":[],"_links":{"self":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/1624"}],"collection":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1624"}],"version-history":[{"count":6,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/1624\/revisions"}],"predecessor-version":[{"id":1796,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=\/wp\/v2\/posts\/1624\/revisions\/1796"}],"wp:attachment":[{"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.liutianfeng.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}