Crypto js Malformed UTF-8 data
Note: If your application is started by jar package, please refer to solution 1; If your application is started by tomcat, please refer to solution 2.
Solution 1: jar package startup configuration
java -jar -Dfile.encoding=utf-8 itemapi-1.0.1.jar
Solution 2: tomat configuration
Set up in Tomcat’s catalina.bat.
set "JAVA_OPTS=%JAVA_OPTS% %LOGGING_CONFIG% -Dfile.encoding=UTF-8"Using the project developed by HBuilderX, WeChat develop tool report an error:
Cannot read property ‘forceUpdate’ of undefined
The solution is shown in the figure:
In the project directory, find manifest.json – WeChat applet configuration – configure “WeChat applet AppID”
Open the developer tool, view the corresponding appid, fill in the upper part, and refresh the developer tool.
If you continue to report this error, restart hbuildx and wechat developer tools after configuration, and re run the project.
When the real machine is running, the console reports an error:
[JS Framework] Failed to execute the callback function:
TypeError: Cannot read property ‘apply’ of undefined
it is recommended to check whether the function in settimout | setinterval is written in full callback function:
before modification:
after modification:
no error after modification
The project runs normally on H5. When it is debugged and opened with the real machine, the app reports an error and a white screen appears.
Scene reproduction:
If the route jumps to the toapproval page, the above problem will occur.
Troubleshooting:
After step-by-step positioning and troubleshooting, the problem appears in the component of toapproval page
Firstly, the toapproval page is under the main business pages folder, but the workflowdetail component of this page is imported from the subcontracting pagesoa folder. This leads to a white screen in the business jump during real machine debugging. However, it is not so strict in H5 browser, so this problem will not occur and it is not easy to locate the problem.
Solution:
If you find the problem, you can easily solve it. You can change the name of this component, copy it to the components folder, and import it from the components folder again.
Uniapp ESLint error: ‘uni‘ is not defined no-undef
Solution:
.eslintrc.js Add
globals: {
uni: true,
wx: true
}[system] TypeError: Cannot read property ‘name’ of undefined
This error occurs because some of the attributes in your curly brackets are undefined
1. Wrong attribute name
2. Another case: when the data is obtained asynchronously, there is no such data attribute during initialization
in my case, case 2, the value of the string is relatively deep, and the definition is only one level up
value structure:
{ "id": 105, ... "dealer": { "sn": null, "password": null, "name": "xx", "departmentSn": null, }, ... },
<view class="content-row">
<text class="cause">待处理：</text>
<text class="cause-detail" v-if="claim_detail_basic_list" >{{claim_detail_basic_list.dealer.name}}</text>
</view>
This side has done error prevention processing
v-if="claim_detail_basic_list"
Because the value object has to be further “claim”_ detail_ basic_ List. Dealer. Name ”
chunk-vendors.js:3874 [Vue warn]: Error in render: "TypeError: Cannot read property 'name' of undefined"
The solution can go one step further.
<view class="content-row">
<text class="cause">ToDoList:</text>
<text class="cause-detail" v-if="claim_detail_basic_list.dealer" >{{claim_detail_basic_list.dealer.name}}</text>
</view>
{{claim_ detail_ basic_ List. Dealer. Name}
OK! Reason: the deep object was not created and there was no attribute of the object when it was initialized.
Uniapp development of small programs, access to user information, request back to the background
{
40125,"errmsg": "invalid appsecret,
view more at http://t.cn/RAEkdV
}
WeChat official account platform
After logging in, find the development management
and get appid in the development management
and then you can get the user information and request the background
Error reporting due to intranet penetration
Invalid Host header
Project root directory manifest. JSON — & gt; Source view – & gt; Add – & gt;
"devServer" : {
"disableHostCheck":true
},
Suppose we upload a JPG image. When we upload using OSS, if we specify that the content type is image/jpeg, the generated outer chain will be displayed directly on the browser. If the set content type is application/octet stream or multipart/form data, the external link is downloaded directly. In the final analysis, the content type in the response header indicates what type the browser is, rather than judging by the URL suffix jpg
First of all, you need to pay attention to the type of image to download. Content type is image/jpeg type. If it is image/JPG type, it may lead to the problem of unknown