Python 使用“刮擦飞溅”选择相关下拉列表

我正在尝试浏览以下网站：。它有两个下拉菜单，第二个菜单取决于第一个菜单，所以我选择使用scrapy和通过scrapy splash使用splash

我需要通过首先选择州，然后选择城市来自动改变位置。我尝试了一个请求，但无法更改城市列表。我的spider是（用于调试的打印）：

---

如果您必须使用站点菜单，我建议您使用Selenium。编写Splash脚本的唯一方法是通过LUA脚本。您必须发送到execute端点并创建一个LUA脚本。我找到了您试图选择的选项，但没有找到提交表单的位置或表单在网站上的运行方式。我确实需要翻译成英语

我的建议是在浏览器检查器中查找端点，如下所示是其中一个看起来特别有趣的端点：

这个端点提供了如下json

{"success":true,"message":"Resultados encontrados","time":"2017-11-30 16:05:20","totalRows":null,"totalPages":null,"page":null,"data":[{"idlocale":338,"idstate":31,"uf":"AC","state":"Acre","region":"N","latitude":null,"longitude":null},{"idlocale":339,"idstate":49,"uf":"AL","state":"Alagoas","region":"NE","latitude":null,"longitude":null},{"idlocale":340,"idstate":41,"uf":"AM","state":"Amazonas","region":"N","latitude":null,"longitude":null},{"idlocale":341,"idstate":30,"uf":"AP","state":"Amap\u00e1","region":"N","latitude":null,"longitude":null},{"idlocale":342,"idstate":56,"uf":"BA","state":"Bahia","region":"NE","latitude":null,"longitude":null},{"idlocale":343,"idstate":44,"uf":"CE","state":"Cear\u00e1","region":"NE","latitude":null,"longitude":null},{"idlocale":344,"idstate":47,"uf":"DF","state":"Distrito Federal","region":"CO","latitude":null,"longitude":null},{"idlocale":345,"idstate":45,"uf":"ES","state":"Esp\u00edrito Santo","region":"SE","latitude":null,"longitude":null},{"idlocale":346,"idstate":54,"uf":"GO","state":"Goi\u00e1s","region":"CO","latitude":null,"longitude":null},{"idlocale":347,"idstate":52,"uf":"MA","state":"Maranh\u00e3o","region":"NE","latitude":null,"longitude":null},{"idlocale":348,"idstate":53,"uf":"MG","state":"Minas Gerais","region":"SE","latitude":null,"longitude":null},{"idlocale":349,"idstate":39,"uf":"MS","state":"Mato Grosso do Sul","region":"CO","latitude":null,"longitude":null},{"idlocale":350,"idstate":40,"uf":"MT","state":"Mato Grosso","region":"CO","latitude":null,"longitude":null},{"idlocale":351,"idstate":50,"uf":"ND","state":"N\u00e3o Aplic\u00e1vel","region":"ND","latitude":null,"longitude":null},{"idlocale":352,"idstate":55,"uf":"PA","state":"Par\u00e1","region":"N","latitude":null,"longitude":null},{"idlocale":353,"idstate":37,"uf":"PB","state":"Para\u00edba","region":"NE","latitude":null,"longitude":null},{"idlocale":354,"idstate":29,"uf":"PE","state":"Pernambuco","region":"NE","latitude":null,"longitude":null},{"idlocale":355,"idstate":33,"uf":"PI","state":"Piau\u00ed","region":"NE","latitude":null,"longitude":null},{"idlocale":356,"idstate":32,"uf":"PR","state":"Paran\u00e1","region":"S","latitude":null,"longitude":null},{"idlocale":357,"idstate":46,"uf":"RJ","state":"Rio de Janeiro","region":"SE","latitude":null,"longitude":null},{"idlocale":358,"idstate":35,"uf":"RN","state":"Rio Grande do Norte","region":"NE","latitude":null,"longitude":null},{"idlocale":359,"idstate":38,"uf":"RO","state":"Rond\u00f4nia","region":"N","latitude":null,"longitude":null},{"idlocale":360,"idstate":43,"uf":"RR","state":"Roraima","region":"N","latitude":null,"longitude":null},{"idlocale":361,"idstate":48,"uf":"RS","state":"Rio Grande do Sul","region":"S","latitude":null,"longitude":null},{"idlocale":362,"idstate":36,"uf":"SC","state":"Santa Catarina","region":"S","latitude":null,"longitude":null},{"idlocale":363,"idstate":51,"uf":"SE","state":"Sergipe","region":"NE","latitude":null,"longitude":null},{"idlocale":364,"idstate":34,"uf":"SP","state":"S\u00e3o Paulo","region":"SE","latitude":null,"longitude":null},{"idlocale":365,"idstate":42,"uf":"TO","state":"Tocantins","region":"N","latitude":null,"longitude":null}]}

希望这是另一种获取您正在寻找的数据的方法

---

然后您可以使用普通请求来获取数据。你只需要形成同样的请求。通常，添加一个accept、useragent和requested以及header就足够了。

谢谢您的回复。我还尝试在POST请求中使用他们的API，但没有成功。我应该发送的参数是uf=SP（或任何其他州的缩写），但类似于给我“success:false”。请尝试让scraper访问页面，您将从中发出post请求，以便scrapy具有正确的会话数据。如果确实没有其他方法，您必须编写LUA脚本或使用Selenium。我能够使用firefox重新发送请求，并获得了成功，尽管我没有更改任何参数。它唯一能做的就是检查cookie，如果你能复制它，它应该100%工作。如果你能弄明白，使用硒还是比花时间去尝试更容易。我知道有点晚了，但也许可以接受我的答案：）

{"success":true,"message":"Resultados encontrados","time":"2017-11-30 16:05:20","totalRows":null,"totalPages":null,"page":null,"data":[{"idlocale":338,"idstate":31,"uf":"AC","state":"Acre","region":"N","latitude":null,"longitude":null},{"idlocale":339,"idstate":49,"uf":"AL","state":"Alagoas","region":"NE","latitude":null,"longitude":null},{"idlocale":340,"idstate":41,"uf":"AM","state":"Amazonas","region":"N","latitude":null,"longitude":null},{"idlocale":341,"idstate":30,"uf":"AP","state":"Amap\u00e1","region":"N","latitude":null,"longitude":null},{"idlocale":342,"idstate":56,"uf":"BA","state":"Bahia","region":"NE","latitude":null,"longitude":null},{"idlocale":343,"idstate":44,"uf":"CE","state":"Cear\u00e1","region":"NE","latitude":null,"longitude":null},{"idlocale":344,"idstate":47,"uf":"DF","state":"Distrito Federal","region":"CO","latitude":null,"longitude":null},{"idlocale":345,"idstate":45,"uf":"ES","state":"Esp\u00edrito Santo","region":"SE","latitude":null,"longitude":null},{"idlocale":346,"idstate":54,"uf":"GO","state":"Goi\u00e1s","region":"CO","latitude":null,"longitude":null},{"idlocale":347,"idstate":52,"uf":"MA","state":"Maranh\u00e3o","region":"NE","latitude":null,"longitude":null},{"idlocale":348,"idstate":53,"uf":"MG","state":"Minas Gerais","region":"SE","latitude":null,"longitude":null},{"idlocale":349,"idstate":39,"uf":"MS","state":"Mato Grosso do Sul","region":"CO","latitude":null,"longitude":null},{"idlocale":350,"idstate":40,"uf":"MT","state":"Mato Grosso","region":"CO","latitude":null,"longitude":null},{"idlocale":351,"idstate":50,"uf":"ND","state":"N\u00e3o Aplic\u00e1vel","region":"ND","latitude":null,"longitude":null},{"idlocale":352,"idstate":55,"uf":"PA","state":"Par\u00e1","region":"N","latitude":null,"longitude":null},{"idlocale":353,"idstate":37,"uf":"PB","state":"Para\u00edba","region":"NE","latitude":null,"longitude":null},{"idlocale":354,"idstate":29,"uf":"PE","state":"Pernambuco","region":"NE","latitude":null,"longitude":null},{"idlocale":355,"idstate":33,"uf":"PI","state":"Piau\u00ed","region":"NE","latitude":null,"longitude":null},{"idlocale":356,"idstate":32,"uf":"PR","state":"Paran\u00e1","region":"S","latitude":null,"longitude":null},{"idlocale":357,"idstate":46,"uf":"RJ","state":"Rio de Janeiro","region":"SE","latitude":null,"longitude":null},{"idlocale":358,"idstate":35,"uf":"RN","state":"Rio Grande do Norte","region":"NE","latitude":null,"longitude":null},{"idlocale":359,"idstate":38,"uf":"RO","state":"Rond\u00f4nia","region":"N","latitude":null,"longitude":null},{"idlocale":360,"idstate":43,"uf":"RR","state":"Roraima","region":"N","latitude":null,"longitude":null},{"idlocale":361,"idstate":48,"uf":"RS","state":"Rio Grande do Sul","region":"S","latitude":null,"longitude":null},{"idlocale":362,"idstate":36,"uf":"SC","state":"Santa Catarina","region":"S","latitude":null,"longitude":null},{"idlocale":363,"idstate":51,"uf":"SE","state":"Sergipe","region":"NE","latitude":null,"longitude":null},{"idlocale":364,"idstate":34,"uf":"SP","state":"S\u00e3o Paulo","region":"SE","latitude":null,"longitude":null},{"idlocale":365,"idstate":42,"uf":"TO","state":"Tocantins","region":"N","latitude":null,"longitude":null}]}