使用python做一个IRC在线下载器

1.开发流程
2.软件流程
3.开始
3.0 准备工作
3.1寻找API接口
3.2 文件模块
3.2.1 选择文件弹窗
3.2.2 提取文件名
3.2.2.1 提取歌名和歌手
3.2.3 下载
4.完成

1.开发流程

Created with Raphaël 2.2.0

开始

寻找歌词API

寻找python相关资料

写代码

检查bug

结束

2.软件流程

Created with Raphaël 2.2.0

开始

弹窗选择文件

检查弹窗返回值，确定文件个数

开始循环

post数据到API接口

下载全部

检查是否循环完毕

结束

yes

no

3.开始

3.0 准备工作

新建.py文件，安装json,requests,tkinter，os库
规范mp3文件名'歌名-歌手.mp3'

3.1寻找API接口

笔者在这里用了http://doc.gecimi.com/en/latest/ 这里的API歌词接口，从该开发文档来看，返回值为Json
例如"http://gecimi.com/api/lyric/海阔天空/Beyond"的返回值为:

{"code":0,"count":15,"result":[{"aid":1563419,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/166/16685/1668536.lrc","sid":1668536,"song":"海阔天空"},

{"aid":1567586,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/167/16739/1673997.lrc","sid":1673997,"song":"海阔天空"},

{"aid":1571906,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/167/16796/1679605.lrc","sid":1679605,"song":"海阔天空"},

{"aid":1573814,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/168/16819/1681961.lrc","sid":1681961,"song":"海阔天空"},

{"aid":1656038,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/179/17907/1790768.lrc","sid":1790768,"song":"海阔天空"},

{"aid":1718741,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/187/18757/1875769.lrc","sid":1875769,"song":"海阔天空"},

{"aid":2003267,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/226/22642/2264296.lrc","sid":2264296,"song":"海阔天空"},

{"aid":2020610,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/228/22889/2288967.lrc","sid":2288967,"song":"海阔天空"},{"aid":2051678,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/233/23323/2332322.lrc","sid":2332322,"song":"海阔天空"},

{"aid":2412704,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/283/28376/2837689.lrc","sid":2837689,"song":"海阔天空"},

{"aid":2607041,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/311/31116/3111659.lrc","sid":3111659,"song":"海阔天空"},

{"aid":2647055,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/316/31663/3166350.lrc","sid":3166350,"song":"海阔天空"},

{"aid":2657468,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/318/31803/3180339.lrc","sid":3180339,"song":"海阔天空"},

{"aid":3093833,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/377/37740/3774083.lrc","sid":3774083,"song":"海阔天空"},

{"aid":3161846,"artist_id":9208,"lrc":"http://s.gecimi.com/lrc/386/38612/3861244.lrc","sid":3861244,"song":"海阔天空"}]}

然后，我们用这段代码就可以把歌词解析出来

# coding: utf-8

import json

import requests

def down(song, singer):

    a = requests.get(

        r"http://gecimi.com/api/lyric/"+song+"/"+singer)

    a.raise_for_status()

    a = a.text

    res = json.loads(a)

    if(res["count"] == 0):

        return "null"

    return res["result"][0]["lrc"]

print(down("海阔天空", "beyond"))

其中，requests库的运用请参考我以前的blog传送门
json库的运用参考这里
至此，我们的抓取歌词代码就解决了

3.2 文件模块

3.2.1 选择文件弹窗

import tkinter.filedialog

def choice():

    filename = tkinter.filedialog.askopenfilenames(

        title=u'选择MP3文件', filetypes=[(u'MP3文件', '*.mp3')])

    if filename != '':

        return filename

    else:

        return "null"

root = tkinter.Tk()    # 创建一个Tkinter.Tk()实例

root.withdraw()       # 将Tkinter.Tk()实例隐藏

c = choice()

for a in range(len(c)):

    print(c[a])

用这段代码就可以实现，并且提取出每一项
参考这里和菜鸟教程

3.2.2 提取文件名

通过这段代码可以提取

print(c[a][len(os.path.dirname(c[a]))+1:])

参考这里

3.2.2.1 提取歌名和歌手

info = name.split(".")[0].split("-")

这段可以实现

3.2.3 下载

参考这里
代码:

r = requests.get(down(info[0], info[1]))

        with open(os.path.dirname(name)+"\\"+name.split(".")[0]+".lrc", "wb") as code:

            code.write(r.content)

4.完成

全部代码:

# coding: utf-8

import os

import tkinter.filedialog

import json

import requests

def down(song, singer):  # 歌词API

    a = requests.get(

        r"http://gecimi.com/api/lyric/"+song+"/"+singer)

    a.raise_for_status()

    a = a.text

    res = json.loads(a)

    if(res["count"] == 0):

        return "null"

    return res["result"][0]["lrc"]

def choice():  # 选择文件

    filename = tkinter.filedialog.askopenfilenames(

        title=u'选择MP3文件', filetypes=[(u'MP3文件', '*.mp3')])

    if filename != '':

        return filename

    else:

        return "null"

# 开始

root = tkinter.Tk()    # 创建一个Tkinter.Tk()实例

root.withdraw()       # 将Tkinter.Tk()实例隐藏

c = choice()

if(c != "null"):

    for a in range(len(c)):

        name = c[a][len(os.path.dirname(c[a]))+1:]

        info = name.split(".")[0].split(" - ")

        res = down(info[0], info[1])

        if(res == "null"):#没有信息

            continue

        r = requests.get(res)

        with open(os.path.dirname(name)+"\\"+name.split(".")[0]+".lrc", "wb") as code:

            code.write(r.content)

        print("成功")

使用python做一个IRC在线下载器的相关教程结束。