LoopBack | 易学教程

Loopback example using INADDR_LOOPBACK does not work

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问题 I am trying to set a loopback socket in C but nothing works. I'm trying to make a function that opens a socket with the loopback address ,send data to socket and from another function read the data but nothing works. I believe that I don't know how to use the functions related to connections. Here is what I accomplished so far: #include <sys/wait.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #include <netdb.h> #include <unistd.h> #include <stdlib.h> #include <ctype

Loopback ValidationError: The `Role` instance is not valid. Details: `name` already exists (value: “admin”)

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问题 I`m too new to loopback, however i followed the steps to install and scaffold my folder (loopback-server), inside server/boot/ i created one file script.js and included the following code: module.exports = function(app) { var MongoDB = app.dataSources.MongoDB; MongoDB.automigrate('Customer', function(err) { if (err) throw (err); var Customer = app.models.Customer; Customer.create([ {username: 'admin', email: 'admin@admin.com', password: 'abcdef'}, {username: 'user', email: 'muppala@ust.hk',

How to override the default password hashing method and validation method of loopback?

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问题 I am very new to Loopback and i want to override the default hashing of password method of loopback to the one that is currently used in my backend so that i can sync this application with that database . i read this link https://groups.google.com/forum/#!topic/loopbackjs/ROv5nQAcNfM but i am not able to understand how to override the password and validation? 回答1: You can override User.hashPassword to implement your own hashing method. Let's say you have a model Customer which has User as

Loopback : model.settings.validateUpsert was overriden to false

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问题 I have a loopback app with mongoDB as below, however my question is about a message on my terminal (not an error) so my terminal would look like this: PS ......path to my app folder....> node . dishes settings.validateUpsert was overriden to false Comments settings.validateUpsert was overriden to false Web server listening at: http://localhost:3000 Browse your REST API at http://localhost:3000/explorer as you can see that the server runs without an error. what is the meaning of that message?

Dockerized Loopback 4 app not reachable from the host

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问题 has anyone successfully dockerize a Loopback-4 (lb4) app? I set up an lb4 based app and am trying to dockerize it, but although the Docker seems to be running the app, it's not showing on my localhost. The steps I did: Setup Loopback 4 based app locally Create Dockerfile (code here) (cd into the dir where Dockerfile is) Build: docker build -t lb4 . Run: docker run -p 3000:3000 lb4 But, the app doesn't show up on http://localhost:3000 The output from running the container: trip@1.0.0 prestart

交换路由大作业

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交换路由大作业 1. 选取设备设备接口 IP地址子网掩码 Vlan80 虚拟接口 10.10.3.129 255.255.255.128 Vlan30 虚拟接口 10.10.2.1 255.255.255.0 Vlan20 虚拟接口 10.10.0.1 255.255.254.0 Vlan10 虚拟接口 10.10.3.1 255.255.255.128 R1 F0/0 1.1.1.2 255.255.255.0 S0/0 2.2.2.1 255.255.255.0 R2 S0/0 2.2.2.2 255.255.255.0 Loopback 0 3.3.3.3 255.255.255.0 ESW1 F0/0 1.1.1.1 255.255.255.0 根据题目给定的信息，选取如下节点设备一台三层交换机（3650-24ps）两台核心路由器（2811）两台二层交换机(2960-24TT) 四台电脑 --> 用来测试Vlan，及其连通性三台服务器（DNS，WWW， Internet） 2. 规划网络 2.1. 规划Vlan 根据给定的信息现将Vlan规划如下一号楼二层交换机命令如下： Switch>enable Switch#configure terminal Enter configuration commands, one per line. End with

Bind to 127.0.0.2

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问题 I'm running a client/server application locally on my Windows XP PC and for testing purposes I want to run multiple clients. The server has a configuration file containing the IP addresses of the clients that can connect; in the real world, these would all be on separate hosts with separate IP addresses. Currently I am able to test locally with a single client which binds to 127.0.0.1 however because I can only have one client-IP mapping in the server configuration (that's how the system

交换路由大作业

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How to modify error messages in Loopback 4?

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问题 Here's a sample error message generated by Loopback for unique item: { "error": { "statusCode": "422", "name": "Error", "message": "ER_DUP_ENTRY: Duplicate entry 's@a.com' for key 'email'", "code": "ER_DUP_ENTRY" } } However, I want to modify it as: { "errors": { "email": [ "The field email should be unique" ] } } Documentation really didn't help me. Can anybody help me on this please? 回答1: You can call the next method with the custom error object. let error = new Error('Custom Error message.

Rewrite requests from loopback to angular2 (Refused to execute script because its MIME type ('text/html') is not executable)

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问题 I am using loopback as a backend api and angular2 as a frontend. I am using loopback to also serve my angular2 frontend. This works fine, however, once I refresh a page, loopback does not know how to handle the url because this is angular's job, not loopback. So I get this error : I understand 100% why I get this error, because once loopback loads my index.html, then angular2 is bootstrapped and knows how to handle those type of URLs because this is specified in my app.routing.ts file.