{"id":525,"date":"2026-05-20T14:15:50","date_gmt":"2026-05-20T06:15:50","guid":{"rendered":"https:\/\/ziyuan.work\/?p=525"},"modified":"2026-05-20T14:16:04","modified_gmt":"2026-05-20T06:16:04","slug":"base64%e7%bc%96%e7%a0%81%ef%bc%88golang%ef%bc%89","status":"publish","type":"post","link":"https:\/\/ziyuan.work\/?p=525","title":{"rendered":"Base64\u7f16\u7801\uff08Golang\uff09"},"content":{"rendered":"\n<p>Base64\u662f\u4e00\u79cd\u752864\u4e2a\u53ef\u6253\u5370\u5b57\u7b26\u6765\u8868\u793a\u4e8c\u8fdb\u5236\u6570\u636e\u7684\u65b9\u6cd5\u3002\u53eb64\u662f\u56e0\u4e3a\u7528\u4e8664\u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n<p class=\"has-large-font-size\">\u4e00\u3001\u9700\u6c42<\/p>\n\n\n\n<p>\u8ba1\u7b97\u673a\u5e95\u5c42\u662f\u4e8c\u8fdb\u5236\uff080\u548c1\uff09\uff0c\u4f46\u5f88\u591a\u4f20\u8f93\u901a\u9053\u53ea\u652f\u6301\u6587\u672c\u3002\u6bd4\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7535\u5b50\u90ae\u4ef6\uff1a\u65e9\u671fSMTP\u534f\u8bae\u53ea\u652f\u6301ASCII\u5b57\u7b26\uff0c\u4f20\u4e0d\u4e86\u4e8c\u8fdb\u5236\u9644\u4ef6<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>URL\uff1a\u6709\u4e9b\u7279\u6b8a\u5b57\u7b26\u5728URL\u91cc\u6709\u7279\u6b8a\u542b\u4e49\uff08? &amp; =\uff09\uff0c\u4e8c\u8fdb\u5236\u6570\u636e\u4f20\u4e0d\u4e86<\/li>\n<\/ul>\n\n\n\n<ul class=\"wp-block-list\">\n<li>HTML\/CSS\uff1a\u5728\u7f51\u9875\u91cc\u76f4\u63a5\u5d4c\u5165\u56fe\u7247\uff0c\u4e0d\u9700\u8981\u989d\u5916\u8bf7\u6c42<\/li>\n\n\n\n<li>JSON\/XML\uff1a\u8fd9\u4e9b\u6587\u672c\u683c\u5f0f\u4e0d\u80fd\u76f4\u63a5\u585e\u4e8c\u8fdb\u5236\u6570\u636e<\/li>\n<\/ul>\n\n\n\n<p>Base64\u5c31\u662f\u628a\u4e8c\u8fdb\u5236\u6570\u636e&#8221;\u7ffb\u8bd1&#8221;\u6210\u7eaf\u6587\u672c\uff0c\u5b89\u5168\u5730\u901a\u8fc7\u8fd9\u4e9b\u901a\u9053\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-large-font-size\">\u4e8c\u3001\u539f\u7406<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"724\" height=\"543\" src=\"https:\/\/ziyuan.work\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-May-20-2026-01_57_36-PM.png\" alt=\"\" class=\"wp-image-527\" srcset=\"https:\/\/ziyuan.work\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-May-20-2026-01_57_36-PM.png 724w, https:\/\/ziyuan.work\/wp-content\/uploads\/2026\/05\/ChatGPT-Image-May-20-2026-01_57_36-PM-300x225.png 300w\" sizes=\"auto, (max-width: 724px) 100vw, 724px\" \/><\/figure>\n\n\n\n<p>\u6bcf3\u4e2a\u5b57\u8282\uff0824\u4f4d\uff09\u5206\u62104\u7ec4\uff0c\u6bcf\u7ec46\u4f4d\uff0c\u67e5\u8868\u5f97\u52304\u4e2a\u5b57\u7b26\u3002<\/p>\n\n\n\n<p>\u539f\u59cb\u6570\u636e\uff1aMan<br>\u4e8c\u8fdb\u5236\uff1a01001101 01100001 01101110<br>6\u4f4d\u5206\u7ec4\uff1a010011 011000 010110 1110(\u886500)<br>\u67e5\u8868\uff1aT W F u<br>\u7ed3\u679c\uff1aTWFu<\/p>\n\n\n\n<p>\u5982\u679c\u539f\u59cb\u6570\u636e\u4e0d\u662f3\u7684\u500d\u6570\uff1a<\/p>\n\n\n\n<p>\u52691\u4e2a\u5b57\u8282 \u2192 \u8f93\u51fa2\u4e2a\u5b57\u7b26 + 2\u4e2a &#8220;=&#8221; \u586b\u5145<\/p>\n\n\n\n<p>\u52692\u4e2a\u5b57\u8282 \u2192 \u8f93\u51fa3\u4e2a\u5b57\u7b26 + 1\u4e2a &#8220;=&#8221; \u586b\u5145<\/p>\n\n\n\n<p class=\"is-style-text-annotation is-style-text-annotation--1\">\u4efb\u4f55\u4e8c\u8fdb\u5236\u6570\u636e\u90fd\u53ef\u4ee5\uff0c\u4e0d\u53ea\u662fPNG<br>\u56fe\u7247\uff1aPNG\u3001JPG\u3001GIF\u3001WEBP\u3001SVG\u3001BMP\u3001ICO<br>\u97f3\u9891\uff1aMP3\u3001WAV\u3001AAC\u3001OGG<br>\u89c6\u9891\uff1aMP4\u3001AVI\u3001WEBM<br>\u6587\u6863\uff1aPDF\u3001ZIP\u3001EXE\u3001DLL<br>\u8bc1\u4e66\uff1aPEM\u683c\u5f0f\u7684SSL\u8bc1\u4e66<br>\u4efb\u610f\u6587\u4ef6\uff1a\u4efb\u4f55\u4f60\u80fd\u60f3\u5230\u7684\u6587\u4ef6<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-large-font-size\">\u4e09\u3001\u5176\u4ed6\u7f16\u7801<\/p>\n\n\n\n<p>Base16\uff08Hex\uff09\uff1a\u752816\u4e2a\u5b57\u7b26\uff080-9 A-F\uff09\uff0c\u4f53\u79ef\u81a8\u80c0100%<br>Base32\uff1a\u752832\u4e2a\u5b57\u7b26\uff0c\u4f53\u79ef\u81a8\u80c0\u7ea660%<br>Base64\uff1a\u752864\u4e2a\u5b57\u7b26\uff0c\u4f53\u79ef\u81a8\u80c0\u7ea633%<br><em>\u4e00\u5f20100KB\u7684PNG\u56fe\u7247\uff1a<br>base64\u7f16\u7801\u540e\u7ea6133KB<br>\u89e3\u7801\u540e\u6062\u590d\u4e3a\u539f\u59cb\u7684100KB PNG<\/em><br>Base85\uff1a\u752885\u4e2a\u5b57\u7b26\uff0c\u4f53\u79ef\u81a8\u80c0\u7ea625%\uff0c\u4f46\u5b57\u7b26\u96c6\u66f4\u590d\u6742<\/p>\n\n\n\n<p class=\"is-style-text-annotation is-style-text-annotation--2\">Base64\u662f\u4f53\u79ef\u548c\u53ef\u8bfb\u6027\u7684\u6700\u4f73\u5e73\u8861\u70b9<\/p>\n\n\n\n<p class=\"has-large-font-size\">\u56db\u3001\u4f7f\u7528\u793a\u4f8b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>package main\n\nimport (\n        \"encoding\/base64\"\n        \"fmt\"\n        \"os\"\n)\n\nfunc main() {\n        \/\/1. \u57fa\u7840\u5b57\u7b26\u4e32\u7f16\u89e3\u7801\n        original := \"Hello, \u4e16\u754c! \"\n        fmt.Printf(\"\u539f\u59cb\u5b57\u7b26\u4e32: %s\\n\", original)\n        encoded := base64.StdEncoding.EncodeToString(&#91;]byte(original))\n        fmt.Printf(\"Base64\u7f16\u7801: %s\\n\", encoded)\n        decoded, err := base64.StdEncoding.DecodeString(encoded)\n        if err != nil {\n                fmt.Printf(\"\u89e3\u7801\u9519\u8bef: %v\\n\", err)\n        } else {\n                fmt.Printf(\"Base64\u89e3\u7801: %s\\n\", string(decoded))\n        }\n\n        \/\/ 2. URL\u5b89\u5168\u7684Base64\n        urlData := \"user+name\/test=data&amp;key=val\"\n        fmt.Printf(\"\u539f\u59cb\u6570\u636e: %s\\n\", urlData)\n        stdEncoded := base64.StdEncoding.EncodeToString(&#91;]byte(urlData))\n        urlEncoded := base64.URLEncoding.EncodeToString(&#91;]byte(urlData))\n        fmt.Printf(\"\u6807\u51c6Base64: %s\\n\", stdEncoded)\n        fmt.Printf(\"URL Base64: %s\\n\", urlEncoded)\n\n        \/\/ 3. \u65e0\u586b\u5145\u7684Base64\n        data := \"abc\"\n        fmt.Printf(\"\u539f\u59cb\u6570\u636e: %s\\n\", data)\n        fmt.Printf(\"\u5e26\u586b\u5145: %s\\n\", base64.StdEncoding.EncodeToString(&#91;]byte(data)))\n        fmt.Printf(\"\u65e0\u586b\u5145: %s\\n\", base64.RawStdEncoding.EncodeToString(&#91;]byte(data)))\n\n        \/\/ 4. \u81ea\u5b9a\u4e49Base64\u5b57\u6bcd\u8868\n        custom := base64.NewEncoding(\"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789~!\")\n        customEncoded := custom.EncodeToString(&#91;]byte(\"Hello World\"))\n        fmt.Printf(\"\u81ea\u5b9a\u4e49\u7f16\u7801: %s\\n\", customEncoded)\n        customDecoded, _ := custom.DecodeString(customEncoded)\n        fmt.Printf(\"\u81ea\u5b9a\u4e49\u89e3\u7801: %s\\n\", string(customDecoded))\n\n        \/\/ 5. \u6a21\u62df\u56fe\u7247Base64\u7f16\u7801\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u5047\u7684PNG\u6587\u4ef6\u5934\uff08\u5b9e\u9645\u9879\u76ee\u4e2d\u66ff\u6362\u4e3a\u771f\u5b9e\u56fe\u7247\u6587\u4ef6\uff09\n        fakePNG := &#91;]byte{\n                0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A, \/\/ PNG\u6587\u4ef6\u5934\n                0x00, 0x00, 0x00, 0x0D, 0x49, 0x48, 0x44, 0x52, \/\/ IHDR\n        }\n        imgEncoded := base64.StdEncoding.EncodeToString(fakePNG)\n        fmt.Printf(\"\u56fe\u7247Base64: %s\\n\", imgEncoded)\n\n        \/\/ \u6a21\u62dfHTML\u5185\u5d4c\uff08\u53d6\u524dmin(30, len)\u4e2a\u5b57\u7b26\uff09\n        prefixLen := 30\n        if len(imgEncoded) &lt; prefixLen {\n                prefixLen = len(imgEncoded)\n        }\n        fmt.Printf(\"HTML\u5185\u5d4c: &lt;img src=\\\"data:image\/png;base64,%s...\\\" \/>\\n\", imgEncoded&#91;:prefixLen])\n\n        \/\/ 6. \u8bfb\u771f\u5b9e\u6587\u4ef6\u5e76\u7f16\u7801\uff08\u5982\u679c\u5b58\u5728\uff09\n        filename := \"\/tmp\/test_base64.txt\"\n        os.WriteFile(filename, &#91;]byte(\"\u8fd9\u662f\u4e00\u4e2a\u6d4b\u8bd5\u6587\u4ef6\u5185\u5bb9\\n\u7528\u4e8e\u6f14\u793aBase64\u7f16\u7801\"), 0644)\n        content, err := os.ReadFile(filename)\n        if err != nil {\n                fmt.Printf(\"\u8bfb\u6587\u4ef6\u5931\u8d25: %v\\n\", err)\n        } else {\n                fileEncoded := base64.StdEncoding.EncodeToString(content)\n                fmt.Printf(\"\u6587\u4ef6\u540d: %s\\n\", filename)\n                fmt.Printf(\"\u539f\u59cb\u5927\u5c0f: %d \u5b57\u8282\\n\", len(content))\n                fmt.Printf(\"\u7f16\u7801\u5927\u5c0f: %d \u5b57\u8282\\n\", len(fileEncoded))\n                fmt.Printf(\"\u81a8\u80c0\u7387: %.1f%%\\n\", float64(len(fileEncoded)-len(content))\/float64(len(content))*100)\n                fmt.Printf(\"Base64: %s\\n\", fileEncoded)\n        }\n        os.Remove(filename)\n\n        \/\/ 7. \u9519\u8bef\u5904\u7406 - \u975e\u6cd5Base64\n        invalidBase64 := \"ThisIsNot@Valid#Base64!\"\n        _, err = base64.StdEncoding.DecodeString(invalidBase64)\n        if err != nil {\n                fmt.Printf(\"\u975e\u6cd5Base64 '%s' \u89e3\u7801\u9519\u8bef: %v\\n\", invalidBase64, err)\n        }\n\n        \/\/ 8. \u4e25\u683c\u6a21\u5f0f\n        \/\/ \u6807\u51c6\u6a21\u5f0f\u5141\u8bb8\u5c3e\u90e8bits\u975e\u96f6\n        loose := base64.StdEncoding\n        strict := base64.StdEncoding.Strict()\n        testData := \"SGVsbG8=\" \/\/ \"Hello\"\n        _, err1 := loose.DecodeString(testData)\n        _, err2 := strict.DecodeString(testData)\n        fmt.Printf(\"\u6807\u51c6\u6a21\u5f0f\u89e3\u7801 '%s': %v\\n\", testData, err1)\n        fmt.Printf(\"\u4e25\u683c\u6a21\u5f0f\u89e3\u7801 '%s': %v\\n\", testData, err2)\n\n        \/\/ 9. \u7f16\u89e3\u7801\u957f\u5ea6\u8ba1\u7b97\n        for _, n := range &#91;]int{1, 2, 3, 4, 5, 6, 10, 100} {\n                encLen := base64.StdEncoding.EncodedLen(n)\n                decLen := base64.StdEncoding.DecodedLen(encLen)\n                fmt.Printf(\"\u8f93\u5165%3d\u5b57\u8282 \u2192 \u7f16\u7801%4d\u5b57\u8282 \u2192 \u89e3\u7801\u6700\u591a%3d\u5b57\u8282\\n\", n, encLen, decLen)\n        }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Base64\u662f\u4e00\u79cd\u752864\u4e2a\u53ef\u6253\u5370\u5b57\u7b26\u6765\u8868\u793a\u4e8c\u8fdb\u5236\u6570\u636e\u7684\u65b9\u6cd5\u3002\u53eb64\u662f\u56e0\u4e3a\u7528\u4e8664\u4e2a\u5b57\u7b26\u3002 \u4e00\u3001\u9700\u6c42 \u8ba1\u7b97\u673a\u5e95\u5c42 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-525","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/ziyuan.work\/index.php?rest_route=\/wp\/v2\/posts\/525","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ziyuan.work\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ziyuan.work\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ziyuan.work\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ziyuan.work\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=525"}],"version-history":[{"count":3,"href":"https:\/\/ziyuan.work\/index.php?rest_route=\/wp\/v2\/posts\/525\/revisions"}],"predecessor-version":[{"id":529,"href":"https:\/\/ziyuan.work\/index.php?rest_route=\/wp\/v2\/posts\/525\/revisions\/529"}],"wp:attachment":[{"href":"https:\/\/ziyuan.work\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=525"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ziyuan.work\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=525"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ziyuan.work\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=525"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}