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用Python给自己DIY一款小说阅读器,你要不看看?

2019-06-26  本文已影响0人  14e61d025165

前一段时间书荒的时候,在喜马拉雅APP发现一个主播播讲的小说-大王饶命。听起来感觉很好笑,挺有意思的,但是只有前200张是免费的,后面就要收费。一章两毛钱,本来是想要买一下,发现说的进度比较慢而且整本书要1300多张,算了一下,需要200大洋才行,而且等他说完,还不知道要到什么时候去。所以就找文字版的来读,文字版又有它的缺点,你必须手眼联动才行。如果要忙别的事情,但是又抑制不住想看的冲动,就很纠结了。在网上找了一圈,没有其他的音频。而且以前用的那些有阅读功能的软件,比如微信阅读、追书神器也都开始收费了。那怎么办呢?这能难倒一个程序员吗?必须滴、坚决滴不能。我用的可是世界上最好的编程语言-Python

Python学习交流群:1004391443

于是乎,自己动手丰衣足食,接下来就让我们实现自己的小说阅读器吧。

语音合成选择

要想读文字,就必须要用到语音合成。现在这种语音合成的软件有很多,其中讯飞和百度是比较好的两种,我们这里就使用百度语音合成API来实现。

创建语音合成应用

首先注册百度账号,然后登录到百度AI开放平台

),创建一个应用

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1561533858873" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;"> image

<input class="pgc-img-caption-ipt" placeholder="图片描述(最多50字)" value="" style="box-sizing: border-box; outline: 0px; color: rgb(102, 102, 102); position: absolute; left: 187.5px; transform: translateX(-50%); padding: 6px 7px; max-width: 100%; width: 375px; text-align: center; cursor: text; font-size: 12px; line-height: 1.5; background-color: rgb(255, 255, 255); background-image: none; border: 0px solid rgb(217, 217, 217); border-radius: 4px; transition: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;"></tt-image>

创建应用

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1561533858879" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;"> image

<input class="pgc-img-caption-ipt" placeholder="图片描述(最多50字)" value="" style="box-sizing: border-box; outline: 0px; color: rgb(102, 102, 102); position: absolute; left: 187.5px; transform: translateX(-50%); padding: 6px 7px; max-width: 100%; width: 375px; text-align: center; cursor: text; font-size: 12px; line-height: 1.5; background-color: rgb(255, 255, 255); background-image: none; border: 0px solid rgb(217, 217, 217); border-radius: 4px; transition: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;"></tt-image>

填写应用名和描述信息提交

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1561533858884" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;"> image

<input class="pgc-img-caption-ipt" placeholder="图片描述(最多50字)" value="" style="box-sizing: border-box; outline: 0px; color: rgb(102, 102, 102); position: absolute; left: 187.5px; transform: translateX(-50%); padding: 6px 7px; max-width: 100%; width: 375px; text-align: center; cursor: text; font-size: 12px; line-height: 1.5; background-color: rgb(255, 255, 255); background-image: none; border: 0px solid rgb(217, 217, 217); border-radius: 4px; transition: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;"></tt-image>

记住AppID、API Key、Secret Key,在使用API的时候会用到,查看一下技术文档

),使用pip install baidu-aip安装完API,文档内有详细的示例代码,很容易就上手了。里面有各种参数解释,比如音量、语调、语速、发声人等。现在语音合成已经有了,已经有了阅读的前提,下面就是获取小说内容了。

获取小说内容

小说内容的获取我们从笔趣阁网站上获取,一方面免费,另一方面没有反爬,找到网站首页https://www.biquge.info/40_40289/,使用requests大法就可以了。简单分析一下页面

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1561533858889" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;"> image

<input class="pgc-img-caption-ipt" placeholder="图片描述(最多50字)" value="" style="box-sizing: border-box; outline: 0px; color: rgb(102, 102, 102); position: absolute; left: 187.5px; transform: translateX(-50%); padding: 6px 7px; max-width: 100%; width: 375px; text-align: center; cursor: text; font-size: 12px; line-height: 1.5; background-color: rgb(255, 255, 255); background-image: none; border: 0px solid rgb(217, 217, 217); border-radius: 4px; transition: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;"></tt-image>

所有章节信息都在dd元素下,而且链接也是很有规律的,直接用xpath获取所有章节列表信息。

<pre spellcheck="false" style="box-sizing: border-box; margin: 5px 0px; padding: 5px 10px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: inherit; vertical-align: baseline; cursor: text; counter-reset: list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; background-color: rgb(240, 240, 240); border-radius: 3px; white-space: pre-wrap; color: rgb(34, 34, 34); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">def get_chapters(self):
url = "https://www.biquge.info/40_40289/"
r = self.session.get(url)
r.encoding = chardet.detect(r.content).get("encoding", "utf-8")
html = etree.HTML(r.text)
for item in html.xpath("//dl/dd/a"):
yield item.attrib["title"], url + item.attrib["href"]
</pre>

章节内容获取也非常简单,就不分析了

<pre spellcheck="false" style="box-sizing: border-box; margin: 5px 0px; padding: 5px 10px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: inherit; vertical-align: baseline; cursor: text; counter-reset: list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; background-color: rgb(240, 240, 240); border-radius: 3px; white-space: pre-wrap; color: rgb(34, 34, 34); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">def get_content(self, url):
r = self.session.get(url)
r.encoding = chardet.detect(r.content).get("encoding", "utf-8")
html = etree.HTML(r.text)
title = html.xpath(r'//*[@class="bookname"]/h1')[0].text
for info in html.xpath("//div[@id='content']"):
text = info.xpath("string(.)")
</pre>

这里有一点要注意的,获取的章节内容中有html元素,xpath为我们提供了string(.),提取多个子节点的文本,非常好用。

合成存储

小说内容获取成功了,与语音合成结合一下,小说阅读器的雏形就有了。简单实现如下:

<pre spellcheck="false" style="box-sizing: border-box; margin: 5px 0px; padding: 5px 10px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: inherit; vertical-align: baseline; cursor: text; counter-reset: list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; background-color: rgb(240, 240, 240); border-radius: 3px; white-space: pre-wrap; color: rgb(34, 34, 34); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">import chardet
import requests
from lxml import etree
from aip import AipSpeech
class CollectNovels:
def init(self):
self.session = requests.session()
self.session.headers["user-agent"] = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36"
""" 你的 APPID AK SK """
APP_ID = '16416498'
API_KEY = 'oEWGafQkaUGqmsmPbfkE5OMx'
SECRET_KEY = '6jdsUcH0PXz5TYoELU47u58W5vPV9lwf'
self.client = AipSpeech(APP_ID, API_KEY, SECRET_KEY)
def get_chapters(self, url):
r = self.session.get(url)
r.encoding = chardet.detect(r.content).get("encoding", "utf-8")
html = etree.HTML(r.text)
for item in html.xpath("//dl/dd/a"):
yield item.attrib["title"], url + item.attrib["href"]
def get_content(self, url):
r = self.session.get(url)
r.encoding = chardet.detect(r.content).get("encoding", "utf-8")
html = etree.HTML(r.text)
for info in html.xpath("//div[@id='content']"):
text = info.xpath("string(.)")
for line in text.split("。"):
content = self.client.synthesis(line, 'zh', 1, {"per": 0})
with open("auido.mp3", "rb") as fp:
fp.write(content)
if name == 'main':
novel = CollectNovels()
home_url = "https://www.biquge.info/40_40289/"
for title, url in novel.get_chapters(home_url):
novel.get_content(url)
</pre>

这里是生成了mp3文件,按行生成以后,再使用合成软件合成后,我们就可以放在任意地方去听了。但是这样也有缺陷,必须提前生成,然后才能使用播放器听,这样不是很方便。如果可以边生成边播放是不是更好呢?

播放合成语音

我们可以使用python的pygame库,其他的好几个库都不太好用,有些已经年久失修了,所以就不用了。

<pre spellcheck="false" style="box-sizing: border-box; margin: 5px 0px; padding: 5px 10px; border: 0px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-weight: 400; font-stretch: inherit; font-size: 16px; line-height: inherit; font-family: inherit; vertical-align: baseline; cursor: text; counter-reset: list-1 0 list-2 0 list-3 0 list-4 0 list-5 0 list-6 0 list-7 0 list-8 0 list-9 0; background-color: rgb(240, 240, 240); border-radius: 3px; white-space: pre-wrap; color: rgb(34, 34, 34); letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-style: initial; text-decoration-color: initial;">import time
import pygame
from io import BytesIO
pygame_mixer = pygame.mixer
pygame_mixer.init(frequency=frequency)
byte_obj = BytesIO()
byte_obj.write(content)
byte_obj.seek(0, 0)
pygame_mixer.music.load(byte_obj)
pygame_mixer.music.play()
while pygame_mixer.music.get_busy():
time.sleep(0.1)
pygame_mixer.stop()
</pre>

这里使用BytesIO将语音合成的二进制文件存储在内存中,就不需要再保存成本地mp3了,有一个需要注意的地方pygame_mixer.init(frequency=frequency),这个frequency参数是音频频率,如果不设置的话默认是22050,播放出来的声音和mp3播放相差太大了,一直以为是这个库有问题,换了好几个,有的是用不了,有的有问题,后来我才发现需要设置这个参数,那么这个参数从哪里来呢?查看之前生成的mp3文件属性

<tt-image data-tteditor-tag="tteditorTag" contenteditable="false" class="syl1561533858938" data-render-status="finished" data-syl-blot="image" style="box-sizing: border-box; cursor: text; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 16px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: left; text-indent: 0px; text-transform: none; white-space: pre-wrap; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-style: initial; text-decoration-color: initial; display: block;"> image

<input class="pgc-img-caption-ipt" placeholder="图片描述(最多50字)" value="" style="box-sizing: border-box; outline: 0px; color: rgb(102, 102, 102); position: absolute; left: 187.5px; transform: translateX(-50%); padding: 6px 7px; max-width: 100%; width: 375px; text-align: center; cursor: text; font-size: 12px; line-height: 1.5; background-color: rgb(255, 255, 255); background-image: none; border: 0px solid rgb(217, 217, 217); border-radius: 4px; transition: all 0.2s cubic-bezier(0.645, 0.045, 0.355, 1) 0s;"></tt-image>

然后将频率设置为16000就可以了。

最终处理

要生成我们最终可以使用的阅读器还有几个问题需要处理。

  1. 合成一句播放一句,这样会有停顿,所以要使用并行处理。
  2. 每次合成如果不进行存储,下一次就必须要重新合成。所以我们使用数据库存储合成的语音。
  3. 获取章节内容、合成语音、播放内容需要独立处理。
  4. 最终代码已经上传到我的GitHub上,请关注我的公众号,发送:小说 获取

后期规划

后期可以增加前端页面,通过前端增加爬取小说信息,显示合成进度、播放进度、选择章节播放等功能。

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