折腾：
【已解决】PySpider模拟小花生app请求parentChildReadingBookQuery2返回空数据
期间，已确定，获取parentChildReadingBookQuery2的不同分页数据时
offset不同：
0
10
20
对应的timestamp和signature值，都是不同的
所以接下来就是要去研究具体生成的机制了。
去看之前：
【已解决】从不同版本的小花生apk中反编译出包含业务逻辑代码的dex和jar包源码
破解到的java源码，看能否找到逻辑。
com/huili/readingclub/activity/classroom/SelfReadingActivity.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | private void getSupportingResources() { JsonObject localJsonObject1 = new JsonObject(); JsonObject localJsonObject2 = new JsonObject(); localJsonObject2.addProperty("userId", MainActivity.userId); localJsonObject2.addProperty("fieldName", this.mFieldName); localJsonObject2.addProperty("fieldValue", this.mFieldValue); localJsonObject2.addProperty("grade", this.mGrades); localJsonObject2.addProperty("level", this.mLevels); localJsonObject1.addProperty("J", localJsonObject2.toString()); localJsonObject1.addProperty("C", Integer.valueOf(0)); XutilsHttpClient.sendHttpJson(this, HttpRequest.HttpMethod.POST, "http://www.xiaohuasheng.cn:83/Reading.svc/getSupportingResourcesInSelfReadingBookQueryCondition", localJsonObject1.toString(), new RequestCallBack() {... |
-》没有看到timestamp和signature
-》说明是类库封装的统一的生成的
-》去看：
XutilsHttpClient.sendHttpJson
->
com/huili/readingclub/network/XutilsHttpClient.java
1 2 | public static void sendHttpJson(Context paramContext, HttpRequest.HttpMethod paramHttpMethod, String paramString1, String paramString2, RequestCallBack<String> paramRequestCallBack)... |
找找
最后通过搜：
“signature”
找到了：
com/huili/readingclub/model/ModelSecurity.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | public static void addSignature(RequestParams paramRequestParams, String paramString) { Object localObject = paramString; } if (((String)localObject).startsWith("/UserService.svc/getToken/")) { return; } int i; if (StringUtil.isNullOrEmpty(MainActivity.userId)) { i = 0; } else { i = Integer.parseInt(MainActivity.userId); } int j = i; if (i < 1) { j = 0; } paramString = ""; if (j != 0) { paramString = getToken(MainActivity.userId); } long l = DateUtils.get1970ToNowSeconds(); if (j == 0) { paramString = new StringBuilder(); paramString.append(l); paramString.append((String)localObject); paramString.append(“AyGt7ohMR!xx#N"); paramString = StringUtil.md5(paramString.toString()); } else { StringBuilder localStringBuilder = new StringBuilder(); localStringBuilder.append(MainActivity.userId); localStringBuilder.append(l); localStringBuilder.append((String)localObject); localStringBuilder.append(paramString); localStringBuilder.append(“AyGt7ohMR!xx#N"); paramString = StringUtil.md5(localStringBuilder.toString()); } if (j != 0) { paramRequestParams.addHeader("userId", MainActivity.userId); } localObject = new StringBuilder(); ((StringBuilder)localObject).append(l); ((StringBuilder)localObject).append(""); paramRequestParams.addHeader("timestamp", ((StringBuilder)localObject).toString()); paramRequestParams.addHeader("signature", paramString); } |
后记：后来发现Jadx导出的源码可读性更好：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 | public static void addSignature(RequestParams requestParams, String str) { if (str.startsWith(MyConfig.SERVER_PORT)) { str = str.substring(MyConfig.SERVER_PORT.length()); } if (!str.startsWith("/UserService.svc/getToken/")) { StringBuilder stringBuilder; int parseInt = StringUtil.isNullOrEmpty(MainActivity.userId) ? 0 : Integer.parseInt(MainActivity.userId); if (parseInt < 1) { parseInt = 0; } String str2 = ""; if (parseInt != 0) { str2 = getToken(MainActivity.userId); } long j = DateUtils.get1970ToNowSeconds(); if (parseInt == 0) { stringBuilder = new StringBuilder(); stringBuilder.append(j); stringBuilder.append(str); stringBuilder.append(MyConfig.SECRET_KEY); str = StringUtil.md5(stringBuilder.toString()); } else { StringBuilder stringBuilder2 = new StringBuilder(); stringBuilder2.append(MainActivity.userId); stringBuilder2.append(j); stringBuilder2.append(str); stringBuilder2.append(str2); stringBuilder2.append(MyConfig.SECRET_KEY); str = StringUtil.md5(stringBuilder2.toString()); } if (parseInt != 0) { requestParams.addHeader(USER.USERID, MainActivity.userId); } stringBuilder = new StringBuilder(); stringBuilder.append(j); stringBuilder.append(""); requestParams.addHeader("timestamp", stringBuilder.toString()); requestParams.addHeader("signature", str); } } |
从而更加利于理解程序的逻辑。
另外又看到了addSignature被调用的地方：
com/huili/readingclub/network/XutilsHttpClient.java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | public static void sendHttpJson(Context paramContext, HttpRequest.HttpMethod paramHttpMethod, String paramString1, String paramString2, RequestCallBack<String> paramRequestCallBack) { if (!isNetWorkAvaiable(paramContext)) { paramRequestCallBack.onFailure(new HttpException("检查网络设置"), "检查网络设置"); return; } RequestParams localRequestParams = new RequestParams(); localRequestParams.addHeader("Content-Type", "application/json"); localRequestParams.addHeader("Authorization", "NSTp9~)NwSfrXp@\\"); try { if (paramHttpMethod == HttpRequest.HttpMethod.GET) { ModelSecurity.addSignature(localRequestParams, paramString1); } else if (paramHttpMethod == HttpRequest.HttpMethod.POST) { ModelSecurity.addSignature(localRequestParams, (String)JsonUtil.jsonToMap(paramString2).get("J")); } }... |
可见：
此处当POST时，传入了：
- localRequestParams
- J字段
然后想办法看看如何转换成python代码：
【已解决】Python实现小花生中addSignature的md5加密生成签名的逻辑
得到了正确的计算signature的逻辑后，再去
python生成timestamp，然后调用signature的md5值的计算逻辑，加上相关函数：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 | #!/usr/bin/env python# -*- encoding: utf-8 -*-# Created on 2019-03-27 15:35:20# Project: XiaohuashengAppfrom pyspider.libs.base_handler import *import osimport jsonimport codecsimport base64import gzipimport copyimport time# import datetimefrom datetime import datetime, timedeltafrom hashlib import md5####################################################################### Const######################################################################RESPONSE_OK = "1001"####################################################################### Config & Settings######################################################################OutputFolder = "/Users/crifan/dev/dev_root/company/xxx/projects/crawler_projects/crawler_xiaohuasheng_app/output"DefaultPageSize = 10UserAgentNoxAndroid = "Mozilla/5.0 (Linux; U; Android 4.4.2; zh-cn; A0001 Build/KOT49H) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1"gUserId = "1134723"gAuthorization = """NSTp9~)NwSfrXp@\\"""# Timestamp = "1553671960"# Signature = "bc8d887e7f16ef92269f55bfd74e131b"# Timestamp = "1553671956"# Signature = "a1f51f6852f42d934f0ac154dc374500"# Timestamp = "1553675572"# Signature = "d516df23120d3c9f0397475f03c61199"# gTimestamp = "1553845333"# gSignature = "2c30a3ac5898fa43eeececfa21560f5b"gUserToken = "40d2267f-359e-4526-951a-66519e5868c3"gSecretKey = “AyGt7ohMR!xxx#N"gHeaders = { "Host": "www.xiaohuasheng.cn:83", "User-Agent": UserAgentNoxAndroid, "Content-Type": "application/json", "userId": gUserId, "Authorization": gAuthorization, # "timestamp": gTimestamp, # "signature": gSignature, "cookie": "ASP.NET_SessionId=dxf3obxgn5t4w350xp3icgy0", # "Cookie2": "$Version=1", "Accept": "*/*", "Accept-Encoding": "gzip, deflate", "cache-control": "no-cache", "Connection": "keep-alive", # "content-length": "202",}####################################################################### Common Util Functions######################################################################def getCurTimestamp(withMilliseconds=False): """ get current time's timestamp (default)not milliseconds -> 10 digits: 1351670162 with milliseconds -> 13 digits: 1531464292921 """ curDatetime = datetime.now() return datetimeToTimestamp(curDatetime, withMilliseconds)def datetimeToTimestamp(datetimeVal, withMilliseconds=False) : """ convert datetime value to timestamp eg: "2006-06-01 00:00:00.123" -> 1149091200 if with milliseconds -> 1149091200123 :param datetimeVal: :return: """ timetupleValue = datetimeVal.timetuple() timestampFloat = time.mktime(timetupleValue) # 1531468736.0 -> 10 digits timestamp10DigitInt = int(timestampFloat) # 1531468736 timestampInt = timestamp10DigitInt if withMilliseconds: microsecondInt = datetimeVal.microsecond # 817762 microsecondFloat = float(microsecondInt)/float(1000000) # 0.817762 timestampFloat = timestampFloat + microsecondFloat # 1531468736.817762 timestampFloat = timestampFloat * 1000 # 1531468736817.7621 -> 13 digits timestamp13DigitInt = int(timestampFloat) # 1531468736817 timestampInt = timestamp13DigitInt return timestampInt...####################################################################### Main######################################################################class Handler(BaseHandler): crawl_config = { # 'headers': { # "Host": "www.xiaohuasheng.cn:83", # "User-Agent": UserAgentNoxAndroid, # "Content-Type": "application/json", # "userId": gUserId, # "Authorization": gAuthorization, # # "timestamp": gTimestamp, # # "signature": gSignature, # "cookie": "ASP.NET_SessionId=dxf3obxgn5t4w350xp3icgy0", # # "Cookie2": "$Version=1", # "Accept": "*/*", # "Accept-Encoding": "gzip, deflate", # "cache-control": "no-cache", # "Connection": "keep-alive", # # "content-length": "202", # }, } def on_start(self): offset = 0 limit = DefaultPageSize self.getParentChildReading(offset, limit) def getParentChildReading(self, offset, limit): print("offset=%d, limit=%d" % (offset, limit)) # jTemplate = """{"userId":"%s","fieldName":"","fieldValue":"全部类别","theStageOfTheChild":"","parentalEnglishLevel":"","supportingResources":"有音频","offset":%d,"limit":%d}""" jTemplate = "{\"userId\":\"%s\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"theStageOfTheChild\":\"\",\"parentalEnglishLevel\":\"\",\"supportingResources\":\"有音频\",\"offset\":%d,\"limit\":%d}" jcJsonDict = { "J": jTemplate % (gUserId, offset, limit), "C": 0 } # print("jcJsonDict=%s" % jcJsonDict) parentChildReadingParamDict = { "offset": offset, "limit": limit, "jTemplate": jTemplate, "jcJsonDict": jcJsonDict } # for debug # jcJsonDict = {"J":"{\"userId\":\"1134723\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"theStageOfTheChild\":\"\",\"parentalEnglishLevel\":\"\",\"supportingResources\":\"\",\"offset\":0,\"limit\":10}","C":0} # jcJsonDict = {"J":"{\"userId\":\"1134723\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"theStageOfTheChild\":\"\",\"parentalEnglishLevel\":\"\",\"supportingResources\":\"有音频\",\"offset\":0,\"limit\":10}","C":0} # jcJsonDict = {"J":"{\"userId\":\"1134723\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"grades\":\"\",\"levels\":\"\",\"supportingResources\":\"有音频\",\"offset\":0,\"limit\":10}","C":0} # jcJsonDict = {"J":"{\"userId\":\"1134723\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"grades\":\"\",\"levels\":\"\",\"supportingResources\":\"\",\"offset\":0,\"limit\":10}","C":0} # jcJsonDict = {"J":'{"userId":"1134723","fieldName":"","fieldValue":"全部类别","grades":"","levels":"","supportingResources":"","offset":0,"limit":10}',"C":0} # jcJsonDict = {"J":"{\"userId\":\"1134723\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"theStageOfTheChild\":\"\",\"parentalEnglishLevel\":\"\",\"supportingResources\":\"有音频\",\"offset\":0,\"limit\":10}","C":0} jValueStr = jcJsonDict["J"] # print("jValueStr=%s" % jValueStr) jcJsonDictStr = json.dumps(jcJsonDict) # print("jcJsonDictStr=%s" % jcJsonDictStr) # # for debug # jcJsonDictStr = '{"J":"{\"userId\":\"1134723\",\"fieldName\":\"\",\"fieldValue\":\"全部类别\",\"theStageOfTheChild\":\"\",\"parentalEnglishLevel\":\"\",\"supportingResources\":\"\",\"offset\":0,\"limit\":10}","C":0}' # print("jcJsonDictStr=%s" % jcJsonDictStr) curHeaders = copy.deepcopy(gHeaders) # print("curHeaders=%s" % curHeaders) # print("type(curHeaders)=%s" % type(curHeaders)) curTimestampInt = getCurTimestamp() # # for debug # curTimestampInt = int(gTimestamp) # print("curTimestampInt=%s" % curTimestampInt) curTimestampStr = str(curTimestampInt) # print("curTimestampStr=%s" % curTimestampStr) curHeaders["timestamp"] = curTimestampStr # jValueParamStr = jcJsonDictStr # jcJsonDictFormattedStr = "%s" % jcJsonDict # jcJsonDictFormattedStr = jcJsonDictFormattedStr.replace(" ", "") # print("jcJsonDictFormattedStr=%s" % jcJsonDictFormattedStr) # jValueParamStr = jcJsonDictFormattedStr jValueParamStr = jValueStr calculatedSignature = self.generateSignature(curTimestampInt, jValueParamStr) # print("calculatedSignature=%s" % calculatedSignature) curHeaders["signature"] = calculatedSignature # # for debug # curHeaders["signature"] = gSignature # print("debug signature=%s" % curHeaders["signature"]) self.crawl(ParentChildReadingUrl, method="POST", # data=jcJsonDict, data= jcJsonDictStr, callback=self.getParentChildReadingCallback, headers=curHeaders, save=parentChildReadingParamDict ) def generateSignature(self, timestampInt, jValueParamStr): # print("generateSignature: timestampInt=%d, jValueParamStr=%s" % (timestampInt, jValueParamStr)) # userId = "1134723" userId = gUserId timestamp = "%s" % timestampInt # localObject = "/Reading.svc/parentChildReadingBookQuery2" # localObject = jValueParamStr # userToken = "40d2267f-359e-4526-951a-66519e5868c3" userToken = gUserToken # fixedSault = “AyGt7ohMR!xx#N" # secretKey = “AyGt7ohMR!xx#N" secretKey = gSecretKey # strToCalc = userId + timestamp + localObject + jValueParamStr + fixedSault # strToCalc = timestamp + localObject + fixedSault strToCalc = userId + timestamp + jValueParamStr + userToken + secretKey # print("strToCalc=%s" % strToCalc) encodedStr = strToCalc.encode() # encodedStr = strToCalc.encode("UTF-8") # print("encodedStr=%s" % encodedStr) md5Result = md5(encodedStr) # print("md5Result=%s" % md5Result) # md5Result=<md5 HASH object @ 0x1044f1df0> # md5Result = md5() # md5Result.update(strToCalc) # md5Digest = md5Result.digest() # print("md5Digest=%s" % md5Digest) # # print("len(md5Digest)=%s" % len(md5Digest)) md5Hexdigest = md5Result.hexdigest() # print("md5Hexdigest=%s" % md5Hexdigest) # print("len(md5Hexdigest)=%s" % len(md5Hexdigest)) # md5Hexdigest=c687d5dfa015246e6bdc6b3c27c2afea print("md5=%s from %s" % (md5Hexdigest, strToCalc)) return md5Hexdigest # return md5Digest def extractResponseData(self, respJson): """ { "C": 2, "J": "H4sIAA.......AA=", "M": "1001", "ST": null } """ # respJson = json.loads(respJson) respM = respJson["M"] if respM != RESPONSE_OK: return None encodedStr = respJson["J"] decodedStr = base64.b64decode(encodedStr) # print("decodedStr=%s" % decodedStr) decompressedStr = gzip.decompress(decodedStr) # print("decompressedStr=%s" % decompressedStr) decompressedStrUnicode = decompressedStr.decode("UTF-8") # print("decompressedStrUnicode=%s" % decompressedStrUnicode) decompressedJson = json.loads(decompressedStrUnicode) respDataDict = decompressedJson return respDataDict def getParentChildReadingCallback(self, response): respUrl = response.url print("respUrl=%s" % respUrl) prevParaDict = response.save print("prevParaDict=%s" % prevParaDict) respJson = response.json print("respJson=%s" % respJson) respData = self.extractResponseData(respJson) print("respData=%s" % respData) if respData: bookSeriesList = respData for eachBookSerie in bookSeriesList: print("eachBookSerie=%s" % eachBookSerie) # self.getStorybookDetail(eachBookSerie) prevOffset = prevParaDict["offset"] limit = prevParaDict["limit"] print("prevOffset=%d, limit=%d" % (prevOffset, limit)) offset = prevOffset + limit self.getParentChildReading(offset, limit) else: print("!!! %s return no more data: %s" % (response.url, respJson)) |
然后再去调用api，应该就可以返回希望的包含了J字段的json字符串了：
直到获取到最后一页的数据为止：
转载请注明：在路上 » 【已解决】小花生app中调用接口parentChildReadingBookQuery2时timestamp和signature生成的逻辑