使用 request.form.get 时 JSON 查找中的意外 return

Question

我发现了一些与我相似的问题，但我无法解决这个问题。

我正在尝试通过 Google 图书 API 执行搜索，但我无法获取用户键入的内容。

<form action="/search">
  <input type="text" id="search" name="seek" placeholder="Search you book..." />
  <button type="submit">Search</button>
</form>

提交后我调用 def search 并尝试获取用户使用 request.form.get("seek") 键入的内容。我是这样做的：

import requests
from flask import Flask, render_template, redirect, request, session

@app.route('/search')
@login_required
def search():
    """Look up search for books."""
    seek = request.form.get("seek")
    try:
        url = f'https://www.googleapis.com/books/v1/volumes?q={seek}'
        response = requests.get(url)
        response.raise_for_status()
    except requests.RequestException:
        return None
    # Parse response
    try:
        search = response.json()
        return render_template("search.html", search={
            "totalItems": int(search["totalItems"]),
            "items": search["items"]
        })
    except (KeyError, TypeError, ValueError):
        return None

终端returns下面几行给我：

DEBUG: Starting new HTTPS connection (1): www.googleapis.com:443
DEBUG: https://www.googleapis.com:443 "GET /books/v1/volumes?q=None HTTP/1.1" 200 None

在HTML中，我就是这样调用显示的：

<p>{{ search['totalItems'] }}</p>
<p>{{ search['items'] }}</p>

Answer 1

我相信这就是您所需要的：

@app.route('/search', methods=["GET", "POST"])
@login_required
def search():
    """Look up search for books."""
    if request.method == "POST":
        try:
            seek = request.form.get("seek")
            ...
        ...
    ...