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社区首页 >问答首页 >http包在flutter中从api获取错误的图像url

问http包在flutter中从api获取错误的图像url
EN

Stack Overflow用户
提问于 2020-07-02 21:10:43
回答 1查看 250关注 0票数 0

我有一个与API连接的flutter应用程序，当我在flutter中使用http包发出Get请求时，它检索所有数据都没有任何问题，除了图像url:例如，这是来自浏览器的图像的url：

代码语言：javascript
运行
复制
http://192.168.43.106:3000/upload\\139585975-e-learning-concept-with-blurred-city-abstract-lights-background.jpg

但从flutter的响应来看，它是这样的：

代码语言：javascript
运行
复制
http://192.168.43.106:3000/upload%5C139585975-e-learning-concept-with-blurred-city-abstract-lights-background.jpg

如您所见，url>>>>中的上传后问题部分

这是API中图像的代码

代码语言：javascript
运行
复制
const storage = multer.diskStorage({
    destination: (req, file, cb)=>{
   cb(null, 'upload');
    },

    filename: (req, file, cb)=>{
        cb(null, file.originalname);
         }
});
const filter = (req, file, cb)=>{
    if(file.mimetype == "image/jpg" || file.mimetype == "image/jpeg" || file.mimetype == "image/png"){
        cb(null, true)
    }else{
        cb(null, false);
    }
}

const upload = multer({
    storage: storage,
    filter: filter
});
app.post('/service' ,upload.single('file'));
app.use('/upload', express.static('upload'));

要获取所有数据，包括图像url：

代码语言：javascript
运行
复制
 getAllServices : async (req, res)=>{
        try {
        const result = await SERVICES.find();
        res.json(
            {result : result.map(result =>{
                return {
                    id : result._id,
                    name : result.name,
                    file : 'http://192.168.43.106:3000:3000/'+result.file,
                    desc : result.desc,
                    price : result.price,
                    cat : result.cat,
                    url : 'http://192.168.43.106:3000:3000/service/'+result._id
                }
            })
            });
        }catch(err){result.json(err)}
        
        },

在flutter side中，我使用以下代码来获取数据：

代码语言：javascript
运行
复制
class ServicesState extends State<Services>{
  getCategories() async {
    var res = await http.get("http://192.168.43.106:3000/service/cat/${widget.cid}");
    if(res.statusCode == 200){
      var jsonObject = json.decode(res.body);
      return jsonObject['result'];
    }
  }

  @override
  void initState() {
    getCategories();
    super.initState();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text(widget.name), actions: <Widget>[
        IconButton(icon: Icon(Icons.arrow_back),
          onPressed: ()=>{
        Navigator.pushReplacementNamed(context, '/cat'),
      },)],),
      body: Center(
        child: FutureBuilder(
          future: getCategories(),
          builder: (context, snapshot){
            if(snapshot.data != null){
              return ListView.builder(
                itemCount: snapshot.data.length,
                itemBuilder: (context, index){
                  return ListTile(
                    onTap: (){
                      Navigator.pushReplacement(context,
                      MaterialPageRoute(builder: (context)=>ServiceDetails(
                        details: ServicesModel(
                          id: snapshot.data[index]['id'],
                          name: snapshot.data[index]['name'],
                          desc: snapshot.data[index]['desc'],
                          price: snapshot.data[index]['price'],
                          file: snapshot.data[index]['file']
                        ) ,)));
                    },
                      leading:Image.network(snapshot.data[index]['file']),
                    title: Text(snapshot.data[index]['name']),
                    subtitle: Text(snapshot.data[index]['price']),
                  );
                },
              );
            }else{
              return Center(child: CircularProgressIndicator(),);
            }

请记住，除了图像url>>>>之外，获取的所有数据都没有任何问题

这就是我得到的错误:如你所见，我从像below>>这样的api中获得了所有数据。

代码语言：javascript
运行
复制
I/flutter (15351): [{id: 5ef73963f8f4f552704eb5fb, name: momen, desc: uni, img: http://192.168.43.106:3000/mo11111}, {id: 5ef755aa9011f235d007d432, name: c1, desc: d1, img: http://192.168.43.106:3000/m1}, {id: 5ef755bb9011f235d007d433, name: c11, desc: d11, img: http://192.168.43.106:3000/m11}, {id: 5ef755e59011f235d007d434, name: c11, desc: d11, img: http://192.168.43.106:3000/m11}, {id: 5ef755f39011f235d007d435, name: c1, desc: d1, img: http://192.168.43.106:3000/m1}, {id: 5ef7567b215f705ec00d439a, name: c1, desc: d1, img: http://192.168.43.106:3000/m1}, {id: 5ef759d4167fb241b82fcfcd, name: newcat, desc: unimmm5n, img: http://192.168.43.106:3000/upload\500_F_216231494_oJFKyTVOUoiFMzvhhetAcSPktyZwhp7L.jpg}, {id: 5ef75ae8d313d64f4cecbfc5, name: c1, desc: d1, img: http://192.168.43.106:3000/cupload\Capture.PNG}, {id: 5ef75f15231fcc4edc13b3b9, name: c1y, desc: d1, img: http://192.168.43.106:3000/cupload\1_ir8j2Ag89QZFAKBZDZWEUw.png}, {id: 5efa29ba17c0672b88fb6ae8, name: catauth, desc: auth cat desc, img: http://192.168.43.106:30
I/flutter (15351): ══╡ EXCEPTION CAUGHT BY IMAGE RESOURCE SERVICE ╞════════════════════════════════════════════════════
I/flutter (15351): The following NetworkImageLoadException was thrown resolving an image codec:
I/flutter (15351): HTTP request failed, statusCode: 404, http://192.168.43.106:3000/mo11111
I/flutter (15351): 
I/flutter (15351): When the exception was thrown, this was the stack:
I/flutter (15351): #0      NetworkImage._loadAsync (package:flutter/src/painting/_network_image_io.dart:90:9)
I/flutter (15351): <asynchronous suspension>
I/flutter (15351): #1      NetworkImage.load (package:flutter/src/painting/_network_image_io.dart:47:14)
I/flutter (15351): #2      ImageProvider.resolve.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:327:17)
I/flutter (15351): #3      ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:160:22)
I/flutter (15351): #4      ImageProvider.resolve.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:325:84)
I/flutter (15351): #5      SynchronousFuture.then (package:flutter/src/foundation/synchronous_future.dart:38:29)
I/flutter (15351): #6      ImageProvider.resolve.<anonymous closure> (package:flutter/src/painting/image_provider.dart:323:11)
I/flutter (15351): #10     ImageProvider.resolve (package:flutter/src/painting/image_provider.dart:315:16)
I/flutter (15351): #11     _ImageState._resolveImage (package:flutter/src/widgets/image.dart:1010:20)
I/flutter (15351): #12     _ImageState.didChangeDependencies (package:flutter/src/widgets/image.dart:967:5)
I/flutter (15351): #13     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4376:12)
I/flutter (15351): #14     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #15     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #16     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #17     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #18     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #19     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #20     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #21     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #22     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #23     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #24     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #25     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #26     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #27     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #28     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #29     _ListTileElement._mountChild (package:flutter/src/material/list_tile.dart:999:30)
I/flutter (15351): #30     _ListTileElement.mount (package:flutter/src/material/list_tile.dart:1013:5)
I/flutter (15351): #31     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #32     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #33     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #34     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #35     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #36     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #37     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #38     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #39     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #40     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #41     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #42     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #43     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #44     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #45     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #46     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #47     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #48     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #49     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #50     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #51     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #52     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #53     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #54     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #55     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #56     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #57     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #58     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #59     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #60     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #61     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #62     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #63     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #64     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #65     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #66     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
I/flutter (15351): #67     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #68     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #69     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #70     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #71     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #72     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #73     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #74     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #75     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #76     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #77     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #78     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #79     SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #80     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #81     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #82     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #83     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #84     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #85     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #86     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #87     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #88     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #89     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #90     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #91     StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
I/flutter (15351): #92     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #93     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #94     Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #95     ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #96     Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #97     ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #98     ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #99     Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #100    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #101    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #102    Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #103    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #104    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
I/flutter (15351): #105    ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #106    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #107    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #108    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #109    Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #110    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #111    ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #112    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #113    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #114    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #115    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #116    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #117    SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5445:14)
I/flutter (15351): #118    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #119    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #120    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #121    Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #122    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #123    ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #124    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #125    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #126    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #127    Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #128    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #129    ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #130    ParentDataElement.mount (package:flutter/src/widgets/framework.dart:4617:11)
I/flutter (15351): #131    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #132    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #133    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #134    Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #135    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #136    StatefulElement._firstBuild (package:flutter/src/widgets/framework.dart:4381:11)
I/flutter (15351): #137    ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)
I/flutter (15351): #138    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #139    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #140    ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4243:16)
I/flutter (15351): #141    Element.rebuild (package:flutter/src/widgets/framework.dart:3947:5)
I/flutter (15351): #142    ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4206:5)
I/flutter (15351): #143    ComponentElement.mount (package:flutter/src/widgets/framework.dart:4201:5)

════════ Exception caught by image resource service ════════════════════════════════════════════════
The following NetworkImageLoadException was thrown resolving an image codec:
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/m1

When the exception was thrown, this was the stack: 
#0      NetworkImage._loadAsync (package:flutter/src/painting/_network_image_io.dart:90:9)
<asynchronous suspension>
#1      NetworkImage.load (package:flutter/src/painting/_network_image_io.dart:47:14)
#2      ImageProvider.resolve.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:flutter/src/painting/image_provider.dart:327:17)
#3      ImageCache.putIfAbsent (package:flutter/src/painting/image_cache.dart:160:22)
...
Image provider: NetworkImage("http://192.168.43.106:3000/m1", scale: 1.0)
Image key: NetworkImage("http://192.168.43.106:3000/m1", scale: 1.0)
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ (2) Exception caught by image resource service ════════════════════════════════════════════
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/m11
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ (3) Exception caught by image resource service ════════════════════════════════════════════
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/upload%5C500_F_216231494_oJFKyTVOUoiFMzvhhetAcSPktyZwhp7L.jpg
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ (4) Exception caught by image resource service ════════════════════════════════════════════
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/cupload%5CCapture.PNG
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ (5) Exception caught by image resource service ════════════════════════════════════════════
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/cupload%5C1_ir8j2Ag89QZFAKBZDZWEUw.png
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ (6) Exception caught by image resource service ════════════════════════════════════════════
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/cupload%5C0157d41e-4db9-4d9a-9632-84c8a4cc15f1.png
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ (7) Exception caught by image resource service ════════════════════════════════════════════
HTTP request failed, statusCode: 404, http://192.168.43.106:3000/cupload%5Cdownload%20(1).jfif
════════════════════════════════════════════════════════════════════════════════════════════════════
I/flutter (15351): [{id: 5ef73963f8f4f552704eb5fb, name: momen, desc: uni, img: http://192.168.43.106:3000/mo11111}, {id: 5ef755aa9011f235d007d432, name: c1, desc: d1, img: http://192.168.43.106:3000/m1}, {id: 5ef755bb9011f235d007d433, name: c11, desc: d11, img: http://192.168.43.106:3000/m11}, {id: 5ef755e59011f235d007d434, name: c11, desc: d11, img: http://192.168.43.106:3000/m11}, {id: 5ef755f39011f235d007d435, name: c1, desc: d1, img: http://192.168.43.106:3000/m1}, {id: 5ef7567b215f705ec00d439a, name: c1, desc: d1, img: http://192.168.43.106:3000/m1}, {id: 5ef759d4167fb241b82fcfcd, name: newcat, desc: unimmm5n, img: http://192.168.43.106:3000/upload\500_F_216231494_oJFKyTVOUoiFMzvhhetAcSPktyZwhp7L.jpg}, {id: 5ef75ae8d313d64f4cecbfc5, name: c1, desc: d1, img: http://192.168.43.106:3000/cupload\Capture.PNG}, {id: 5ef75f15231fcc4edc13b3b9, name: c1y, desc: d1, img: http://192.168.43.106:3000/cupload\1_ir8j2Ag89QZFAKBZDZWEUw.png}, {id: 5efa29ba17c0672b88fb6ae8, name: catauth, desc: auth cat desc, img: http://192.168.43.106:30
I/flutter (15351): #144    Element.inflateWidget (package:flutter/src/widgets/framework.dart:3194:14)
I/flutter (15351): #145    Element.updateChild (package:flutter/src/widgets/framework.dart:2988:12)
I/flutter (15351): #146    SliverMultiBoxAdaptorElement.updateChild (package:flutter/src/widgets/sliver.dart:1288:36)
I/flutter (15351): #147    SliverMultiBoxAdaptorElement.createChild.<anonymous closure> (package:flutter/src/widgets/sliver.dart:1273:20)
I/flutter (15351): #148    BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2412:19)
I/flutter (15351): #149    SliverMultiBoxAdaptorElement.createChild (package:flutter/src/widgets/sliver.dart:1266:11)
I/flutter (15351): #150    RenderSliverMultiBoxAdaptor._createOrObtainChild.<anonymous closure> (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:354:23)
I/flutter (15351): #151    RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:1823:58)
I/flutter (15351): #152    PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:875:15)
I/flutter (15351): #153    RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:1823:13)
I/flutter (15351): #154    RenderSliverMultiBoxAdaptor._createOrObtainChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:343:5)
I/flutter (15351): #155    RenderSliverMultiBoxAdaptor.addInitialChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:427:5)
I/flutter (15351): #156    RenderSliverList.performLayout (package:flutter/src/rendering/sliver_list.dart:78:12)
I/flutter (15351): #157    RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
I/flutter (15351): #158    RenderSliverEdgeInsetsPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:134:11)
I/flutter (15351): #159    RenderSliverPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:373:11)
I/flutter (15351): #160    RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
I/flutter (15351): #161    RenderViewportBase.layoutChildSequence (package:flutter/src/rendering/viewport.dart:410:13)
I/flutter (15351): #162    RenderViewport._attemptLayout (package:flutter/src/rendering/viewport.dart:1367:12)
I/flutter (15351): #163    RenderViewport.performLayout (package:flutter/src/rendering/viewport.dart:1285:20)
I/flutter (15351): #164    RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
I/flutter (15351): #165    RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
I/flutter (15351): #166    RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
I/flutter (15351): #167    RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
I/flutter (15351): #168    RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
I/flutter (15351): #169    RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
I/flutter (15351): #170    RenderObject.layout (package:flutter/src/rendering/object.dart:1724:7)
I/flutter (15351): #171    RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:105:13)
I/flutter (15351): #172    RenderObject.layout
node.js
image
api
http
flutter
EN

回答 1

Stack Overflow用户

发布于 2020-07-03 00:26:53

%5C是问题所在，请参见。每当在dart中使用'\something‘时，这里的\是转义序列，它的下一个序列被视为特殊字符。现在您有两个\，因此您知道\的字符值或编码版本是十六进制码中的5C。

所以你所要做的就是把它当做原始字符串来处理，这样你就可以在r''中获得字符串，你的工作就完成了

你所能做的就是做一些代码来获得url拆分字符串。但这将是一条漫长的道路希望这能有所帮助：)

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/62697147

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