我有一个应用程序,其中前端是通过VUE和后端是FastAPI,通信是通过WebSocket完成的.
目前,前端允许用户输入一个术语,该术语被发送到后端以生成自动补全,还可以对返回json的URL执行搜索.在其中,我将这个json保存在前端文件夹中.之后,后端将有问题的术语的自动补全数据返回到前端.前端显示自动完成和json数据.
然而,当我进一步研究时,我注意到有一种方法可以将请求URL返回的json发送到Vue(前端),而不必将其保存在本地,从而避免出现不允许多次执行该进程的错误.
我当前的代码如下所示.对于FastAPI(后端):
@app.websocket("/")
async def predict_question(websocket: WebSocket):
await websocket.accept()
while True:
input_text = await websocket.receive_text()
autocomplete_text = text_gen.generate_text(input_text)
autocomplete_text = re.sub(r"[\([{})\]]", "", autocomplete_text)
autocomplete_text = autocomplete_text.split()
autocomplete_text = autocomplete_text[0:2]
resp = req.get('www.description_url_search_='+input_text+'')
datajson = resp.json()
with open('/home/user/backup/AutoComplete/frontend/src/data.json', 'w', encoding='utf-8') as f:
json.dump(datajson, f, ensure_ascii=False, indent=4)
await websocket.send_text(' '.join(autocomplete_text))
文件App.vue(前端):
<template>
<div class="main-container">
<h1 style="color:#0072c6;">Title</h1>
<p style="text-align:center; color:#0072c6;">
Version 0.1
<br>
</p>
<Autocomplete />
<br>
</div>
<div style="color:#0072c6;">
<JsonArq />
</div>
<div style="text-align:center;">
<img src="./components/logo-1536.png" width=250 height=200 alt="Logo" >
</div>
</template>
<script>
import Autocomplete from './components/Autocomplete.vue'
import JsonArq from './components/EstepeJSON.vue'
export default {
name: 'App',
components: {
Autocomplete,
JsonArq: JsonArq
}
}
</script>
<style>
.main-container {
display: flex;
justify-content: center;
align-items: center;
flex-direction: column;
font-family: 'Fredoka', sans-serif;
}
h1 {
font-size: 3rem;
}
@import url('https://fonts.googleapis.com/css2?family=Fredoka&display=swap');
</style>
Components目录中的AutoComplete e.vue文件:
<template>
<div class="pad-container">
<div tabindex="1" @focus="setCaret" class="autocomplete-container">
<span @input="sendText" @keypress="preventInput" ref="editbar" class="editable" contenteditable="true"></span>
<span class="placeholder" contenteditable="false">{{autoComplete}}</span>
</div>
</div>
</template>
<script>
export default {
name: 'Autocomplete',
data: function() {
return {
autoComplete: "",
maxChars: 75,
connection: null
}
},
mounted() {
const url = "ws://localhost:8000/"
this.connection = new WebSocket(url);
this.connection.onopen = () => console.log("connection established");
this.connection.onmessage = this.receiveText;
},
methods: {
setCaret() {
const range= document.createRange()
const sel = window.getSelection();
const parentNode = this.$refs.editbar;
if (parentNode.firstChild == undefined) {
const emptyNode = document.createTextNode("");
parentNode.appendChild(emptyNode);
}
range.setStartAfter(this.$refs.editbar.firstChild);
range.collapse(true);
sel.removeAllRanges();
sel.addRange(range);
},
preventInput(event) {
let prevent = false;
// handles capital letters, numbers, and punctuations input
if (event.key == event.key.toUpperCase()) {
prevent = true;
}
// exempt spacebar input
if (event.code == "Space") {
prevent = false;
}
// handle input overflow
const nChars = this.$refs.editbar.textContent.length;
if (nChars >= this.maxChars) {
prevent = true;
}
if (prevent == true) {
event.preventDefault();
}
},
sendText() {
const inputText = this.$refs.editbar.textContent;
this.connection.send(inputText);
},
receiveText(event) {
this.autoComplete = event.data;
}
}
}
</script>
Components目录中的EstepeJSON.ue文件:
<template>
<div width="80%" v-for="regList in myJson" :key="regList" class="container">
<table>
<thead>
<tr>
<th>Documento</th>
</tr>
</thead>
<tbody>
<tr v-for="countryList in regList[2]" :key="countryList">
<td style="visibility: visible">{{ countryList}}</td>
</tr>
</tbody>
</table>
</div>
<link
rel="stylesheet"
href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css"
/>
</template>
<script>
import json from "@/data.json";
export default {
name: "EstepeJson",
data() {
return {
myJson: json,
};
},
};
</script>
URL返回的JSON示例:
[
{
"Title": "SOFT-STARTER",
"Cod": "Produto: 15775931",
"Description": "A soft-starter SSW7000 permite o controle de partida/parada e proteção de motores.",
"Technical_characteristics": ["Corrente nominal", "600 A", "Tensão nominal", "4,16 kV", "Tensão auxiliar", "200-240 V", "Grau de proteção", "IP41", "Certificação", "CE"]
},
{
"Title": "SOFT-STARTER SSW",
"Cod": "Produto: 14223395",
"Description": "A soft-starter SSW7000 permite o controle de partida/parada e proteção de motores de indução trifásicos de média tensão.",
"Technical_characteristics": ["Corrente nominal", "125 A", "Tensão nominal", "6,9 kV", "Tensão auxiliar", "200-240 V", "Grau de proteção", "IP54/NEMA12", "Certificação", "CE"]
}
]