317 lines
9.5 KiB
Python
317 lines
9.5 KiB
Python
# 声明：本代码仅供学习和研究目的使用。使用者应遵守以下原则：
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# 1. 不得用于任何商业用途。
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# 2. 使用时应遵守目标平台的使用条款和robots.txt规则。
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# 3. 不得进行大规模爬取或对平台造成运营干扰。
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# 4. 应合理控制请求频率，避免给目标平台带来不必要的负担。
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# 5. 不得用于任何非法或不当的用途。
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#
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# 详细许可条款请参阅项目根目录下的LICENSE文件。
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# 使用本代码即表示您同意遵守上述原则和LICENSE中的所有条款。
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import ctypes
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import json
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import random
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import time
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import urllib.parse
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from model.m_xiaohongshu import NoteUrlInfo
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from tools.crawler_util import extract_url_params_to_dict
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def sign(a1="", b1="", x_s="", x_t=""):
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"""
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takes in a URI (uniform resource identifier), an optional data dictionary, and an optional ctime parameter. It returns a dictionary containing two keys: "x-s" and "x-t".
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"""
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common = {
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"s0": 3, # getPlatformCode
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"s1": "",
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"x0": "1", # localStorage.getItem("b1b1")
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"x1": "3.7.8-2", # version
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"x2": "Mac OS",
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"x3": "xhs-pc-web",
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"x4": "4.27.2",
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"x5": a1, # cookie of a1
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"x6": x_t,
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"x7": x_s,
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"x8": b1, # localStorage.getItem("b1")
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"x9": mrc(x_t + x_s + b1),
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"x10": 154, # getSigCount
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}
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encode_str = encodeUtf8(json.dumps(common, separators=(',', ':')))
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x_s_common = b64Encode(encode_str)
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x_b3_traceid = get_b3_trace_id()
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return {
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"x-s": x_s,
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"x-t": x_t,
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"x-s-common": x_s_common,
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"x-b3-traceid": x_b3_traceid
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}
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def get_b3_trace_id():
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re = "abcdef0123456789"
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je = 16
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e = ""
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for t in range(16):
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e += re[random.randint(0, je - 1)]
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return e
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def mrc(e):
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ie = [
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0, 1996959894, 3993919788, 2567524794, 124634137, 1886057615, 3915621685,
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2657392035, 249268274, 2044508324, 3772115230, 2547177864, 162941995,
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2125561021, 3887607047, 2428444049, 498536548, 1789927666, 4089016648,
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2227061214, 450548861, 1843258603, 4107580753, 2211677639, 325883990,
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1684777152, 4251122042, 2321926636, 335633487, 1661365465, 4195302755,
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2366115317, 997073096, 1281953886, 3579855332, 2724688242, 1006888145,
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1258607687, 3524101629, 2768942443, 901097722, 1119000684, 3686517206,
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2898065728, 853044451, 1172266101, 3705015759, 2882616665, 651767980,
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1373503546, 3369554304, 3218104598, 565507253, 1454621731, 3485111705,
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3099436303, 671266974, 1594198024, 3322730930, 2970347812, 795835527,
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1483230225, 3244367275, 3060149565, 1994146192, 31158534, 2563907772,
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4023717930, 1907459465, 112637215, 2680153253, 3904427059, 2013776290,
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251722036, 2517215374, 3775830040, 2137656763, 141376813, 2439277719,
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3865271297, 1802195444, 476864866, 2238001368, 4066508878, 1812370925,
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453092731, 2181625025, 4111451223, 1706088902, 314042704, 2344532202,
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4240017532, 1658658271, 366619977, 2362670323, 4224994405, 1303535960,
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984961486, 2747007092, 3569037538, 1256170817, 1037604311, 2765210733,
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3554079995, 1131014506, 879679996, 2909243462, 3663771856, 1141124467,
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855842277, 2852801631, 3708648649, 1342533948, 654459306, 3188396048,
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3373015174, 1466479909, 544179635, 3110523913, 3462522015, 1591671054,
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702138776, 2966460450, 3352799412, 1504918807, 783551873, 3082640443,
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3233442989, 3988292384, 2596254646, 62317068, 1957810842, 3939845945,
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2647816111, 81470997, 1943803523, 3814918930, 2489596804, 225274430,
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2053790376, 3826175755, 2466906013, 167816743, 2097651377, 4027552580,
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2265490386, 503444072, 1762050814, 4150417245, 2154129355, 426522225,
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1852507879, 4275313526, 2312317920, 282753626, 1742555852, 4189708143,
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2394877945, 397917763, 1622183637, 3604390888, 2714866558, 953729732,
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1340076626, 3518719985, 2797360999, 1068828381, 1219638859, 3624741850,
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2936675148, 906185462, 1090812512, 3747672003, 2825379669, 829329135,
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1181335161, 3412177804, 3160834842, 628085408, 1382605366, 3423369109,
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3138078467, 570562233, 1426400815, 3317316542, 2998733608, 733239954,
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1555261956, 3268935591, 3050360625, 752459403, 1541320221, 2607071920,
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3965973030, 1969922972, 40735498, 2617837225, 3943577151, 1913087877,
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83908371, 2512341634, 3803740692, 2075208622, 213261112, 2463272603,
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3855990285, 2094854071, 198958881, 2262029012, 4057260610, 1759359992,
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534414190, 2176718541, 4139329115, 1873836001, 414664567, 2282248934,
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4279200368, 1711684554, 285281116, 2405801727, 4167216745, 1634467795,
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376229701, 2685067896, 3608007406, 1308918612, 956543938, 2808555105,
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3495958263, 1231636301, 1047427035, 2932959818, 3654703836, 1088359270,
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936918000, 2847714899, 3736837829, 1202900863, 817233897, 3183342108,
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3401237130, 1404277552, 615818150, 3134207493, 3453421203, 1423857449,
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601450431, 3009837614, 3294710456, 1567103746, 711928724, 3020668471,
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3272380065, 1510334235, 755167117,
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]
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o = -1
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def right_without_sign(num: int, bit: int=0) -> int:
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val = ctypes.c_uint32(num).value >> bit
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MAX32INT = 4294967295
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return (val + (MAX32INT + 1)) % (2 * (MAX32INT + 1)) - MAX32INT - 1
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for n in range(57):
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o = ie[(o & 255) ^ ord(e[n])] ^ right_without_sign(o, 8)
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return o ^ -1 ^ 3988292384
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lookup = [
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"Z",
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"m",
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"s",
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"e",
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"r",
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"b",
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"B",
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"o",
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"H",
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"Q",
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"t",
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"N",
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"P",
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"+",
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"w",
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"O",
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"c",
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"z",
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"a",
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"/",
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"L",
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"p",
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"n",
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"g",
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"G",
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"8",
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"y",
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"J",
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"q",
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"4",
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"2",
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"K",
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"W",
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"Y",
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"j",
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"0",
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"D",
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"S",
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"f",
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"d",
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"i",
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"k",
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"x",
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"3",
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"V",
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"T",
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"1",
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"6",
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"I",
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"l",
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"U",
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"A",
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"F",
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"M",
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"9",
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"7",
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"h",
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"E",
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"C",
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"v",
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"u",
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"R",
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"X",
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"5",
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]
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def tripletToBase64(e):
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return (
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lookup[63 & (e >> 18)] +
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lookup[63 & (e >> 12)] +
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lookup[(e >> 6) & 63] +
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lookup[e & 63]
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)
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def encodeChunk(e, t, r):
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m = []
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for b in range(t, r, 3):
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n = (16711680 & (e[b] << 16)) + \
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((e[b + 1] << 8) & 65280) + (e[b + 2] & 255)
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m.append(tripletToBase64(n))
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return ''.join(m)
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def b64Encode(e):
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P = len(e)
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W = P % 3
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U = []
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z = 16383
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H = 0
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Z = P - W
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while H < Z:
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U.append(encodeChunk(e, H, Z if H + z > Z else H + z))
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H += z
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if 1 == W:
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F = e[P - 1]
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U.append(lookup[F >> 2] + lookup[(F << 4) & 63] + "==")
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elif 2 == W:
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F = (e[P - 2] << 8) + e[P - 1]
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U.append(lookup[F >> 10] + lookup[63 & (F >> 4)] +
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lookup[(F << 2) & 63] + "=")
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return "".join(U)
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def encodeUtf8(e):
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b = []
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m = urllib.parse.quote(e, safe='~()*!.\'')
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w = 0
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while w < len(m):
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T = m[w]
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if T == "%":
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E = m[w + 1] + m[w + 2]
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S = int(E, 16)
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b.append(S)
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w += 2
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else:
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b.append(ord(T[0]))
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w += 1
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return b
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def base36encode(number, alphabet='0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'):
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"""Converts an integer to a base36 string."""
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if not isinstance(number, int):
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raise TypeError('number must be an integer')
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base36 = ''
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sign = ''
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if number < 0:
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sign = '-'
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number = -number
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if 0 <= number < len(alphabet):
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return sign + alphabet[number]
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while number != 0:
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number, i = divmod(number, len(alphabet))
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base36 = alphabet[i] + base36
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return sign + base36
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def base36decode(number):
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return int(number, 36)
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def get_search_id():
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e = int(time.time() * 1000) << 64
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t = int(random.uniform(0, 2147483646))
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return base36encode((e + t))
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img_cdns = [
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"https://sns-img-qc.xhscdn.com",
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"https://sns-img-hw.xhscdn.com",
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"https://sns-img-bd.xhscdn.com",
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"https://sns-img-qn.xhscdn.com",
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]
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def get_img_url_by_trace_id(trace_id: str, format_type: str = "png"):
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return f"{random.choice(img_cdns)}/{trace_id}?imageView2/format/{format_type}"
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def get_img_urls_by_trace_id(trace_id: str, format_type: str = "png"):
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return [f"{cdn}/{trace_id}?imageView2/format/{format_type}" for cdn in img_cdns]
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def get_trace_id(img_url: str):
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# 浏览器端上传的图片多了 /spectrum/ 这个路径
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return f"spectrum/{img_url.split('/')[-1]}" if img_url.find("spectrum") != -1 else img_url.split("/")[-1]
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def parse_note_info_from_note_url(url: str) -> NoteUrlInfo:
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"""
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从小红书笔记url中解析出笔记信息
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Args:
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url: "https://www.xiaohongshu.com/explore/66fad51c000000001b0224b8?xsec_token=AB3rO-QopW5sgrJ41GwN01WCXh6yWPxjSoFI9D5JIMgKw=&xsec_source=pc_search"
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Returns:
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"""
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note_id = url.split("/")[-1].split("?")[0]
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params = extract_url_params_to_dict(url)
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xsec_token = params.get("xsec_token", "")
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xsec_source = params.get("xsec_source", "")
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return NoteUrlInfo(note_id=note_id, xsec_token=xsec_token, xsec_source=xsec_source)
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if __name__ == '__main__':
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_img_url = "https://sns-img-bd.xhscdn.com/7a3abfaf-90c1-a828-5de7-022c80b92aa3"
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# 获取一个图片地址在多个cdn下的url地址
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# final_img_urls = get_img_urls_by_trace_id(get_trace_id(_img_url))
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final_img_url = get_img_url_by_trace_id(get_trace_id(_img_url))
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print(final_img_url)
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