反向工程 HTTP 请求 [英] Reverse Engineer HTTP request

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本文介绍了反向工程 HTTP 请求的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我截获了一个从 iPhone 到 Instagram 的关于 Charles 的 HTTP 请求，这是标头

POST/logging_client_events HTTP/1.1主持人:graph.instagram.com内容类型:application/x-www-form-urlencoded；字符集=UTF-8连接:保持连接接受: */*用户代理:Instagram 10.0.1 (iPhone8,1; iOS 10_1_1; en_IN; en-IN; en; scale=2.00; 750x1334) AppleWebKit/420+接受语言:en-IN;q=1.0, hi-IN;q=0.9,内容长度:1601接受编码:gzip、deflate

在压缩的请求中也有一个 Post 数据.我的问题是如何解压缩 Post 数据?也许 NSData 中的任何方法都可以解压?

这是完整的 HTTP 请求

POST/logging_client_events HTTP/1.1主持人:graph.instagram.com内容类型:application/x-www-form-urlencoded；字符集=UTF-8连接:保持连接接受: */*用户代理:Instagram 10.3.0 (iPhone8,1; iOS 10_1_1; en_IN; en-IN; scale=2.00; gamut=normal; 750x1334) AppleWebKit/420+接受语言:en-IN;q=1, hi-IN;q=0.9内容长度:4585接受编码:gzip、deflate消息= eNrtXG1v4kgS％2FiunfLqTAupXtzvSfiAxZInOZsmQEPt0sowxYGNj1jZDYLX326％2FaMBNICJMsZCajTUZRwO6XqvJT1c％2FTtuePE286dcP％2BydkJJgwRxgUjumCYnZyezMrjCD4VYRKcnGGmU0GIQKiKGEWUnZa9PweZ6o6qtIr％2B8U％2BmIYGEwP％2BCbv3gc％2BgH6％2BHPBdcb51rFuJCNCmsYuKJf6EZFq％2BlMN2pGDV0I6DLwkjBeuJs9Gb1gBqnXK3rDqFfAPKMi8UWtYvCaIKyGOZM16JkHeR6mk1Wf8xqqo4sGhuYNvcIouaicn2ukQhr8HLzQ5LlGlYFe4Z2c％2FeePkyTtz2JwUTkExyee8vdkHvTy1B8Hheunk0ngF65XFEEyLR6HRJOkyhETQp6eBPdFBoP％2BcTIdwxCE6IxSHWvs5M8％2FT5％2BbKBy6vwducD9N81kW7Bxdl4xvDD7M0tkUehZBXrhgZOjFysgCGrgQBD8Og4kys4zGhhGnT8xSg06DDCaEDqUpYZq7gyDou7NB6GZBP8jD4eRg8zmjz9h％2FgJm59zk40DJJBZI7LMvSOE5nhxq3CmSRpnERTh9ZujoFneJwEjzYnAVB7IIxCzdMptkK1bss1zHBSGxYXvYBT8NC9ThDu％2ByMQ7CpnMFPZ8pYaFX220of1vOQlJT3PU2ygAVSoCDQexj7cuB5PoGBklkB1j8ayXOfzjjycjdZlC3LNp％2FDYP605ySYPz4U5u6Xo％2BD3kUMnNKy％2Fy9BxRDgl6L0GjhCKtPcYOCw1LHWpi3cbOU0I％2Bh4jxwXXpIDL％2Bl4jR％2BHL％2B0xWiTSJEf3ekQsneeENMy9x02zoTULfzWe9b0WRYUQ2gpinswwYVjp​​wPX8VxyezJS5YiNXf8P6ZMH9JPqYLKAyA8cdE7KG1SwhCmoHrFUSpVmE65hXJiKzUmDwX9QuBGoZWzroekmANuCb0pPCLMMLu1jTghz8OJ0NYXMeBMj9YXC29bn9m311jP7kJW2Ez％2FPfF1dy％2BI％2FMeaYyb0VQ0k3h5Rxozu3vP％2B5dx5GOJ％2FKQReeRWnUf％2B5DaGPkvn7orA76B％2FKTOny9RY95YxXFrLOrIMe2EZTTIw6siM6sSM％2FLnZsZG5rBPLqN2bRkM3oyazDHPZMuDYr3NiR7W5Y9jEurSxZViRc2mFrc7VuHXZntvLm3tzeTuyl6NRq9tcOJGN7ChO7ATmjBqh1akRK7LnLaMxhvMwvjW2E5s1w3nYv7udOhdNrRn53InaBNou7K4zbnXgcxfGTG4jJ2kvra6JreUNjNskZqe9AHsX1rIG47eXpe1GfW5％2BupLgu％2FIb4ihnzSjFg％2FYvvyhWrrjQ3AXUFbNcIaX8DsE％2FjHsBJoXcxQo79U％2BdQ8nr57AfpK4fxLHrzYp0GkPy92bDAWB52％2BiV1niwe831FYT9kTcZ7jZdSkz2sf3TjXGUlAgH4dYxlbLFYqomvOhce％2F0wrfk％2BZE4n8EeTNE6Hi18％2FGb％2FVngY4Dn2vWCX52uDYm038kTvLvV6801hJgVNsqoe1yxCw30bpJNBPMXRL85WMw1X1LZyEBaSWux48gZOYy6rATEisqbKn3H％2Fq9Zd％2BE8BL2QlxGFAirlP40TQQjT1IXHWlJ31XtT45G3hxHjx0VQUJqrfqrWFRFZqmC45AnGJNf2i1crdspUtcZYKXhjGuYfqCoE1n％2BQiMLOC6rE7BylAUCtK7AsigdG1Wz57XHwYwc5HNwHAvDrLi67dcefb1246aCZpZZdKuS1eO605mSU％2BJaii5sQf67snRzJt％2FNfdM7MnBfpgp2ToLXciSwU7XBCZiExuDMIMppx7gfu0CrCqzWKVXPishujMP1XpXLk299F7Ns4J2Fvw％2BUwq1nBaOpgXo1P4sW12MM03yPcZngRerjipVcj8Le8E％2B％2FS2FBgDbcORrd0j％2B0IfxZnmQVfo5qTwY％2Fj％2By05nHM09LgHgxHO8voKSFubrcJWz32F％2Fq8UnhxqnXD％2Fo7bdYZQZs2f％2BmyDt90lBbpTgs3x15F9wwyF2LAOWFSSp0gjT40g5WiGAFUONpj78N2Rz％2Fsu％2Bk02EEkaFVyjW9JgFfsczy9ojvCwqqUUV2KvcX1hRf3lUQ0CwYA9tEumxgVQtP32nQ0zjkHLrnOtcEs％2FpKGO5noptlfUDMJinmajU9eSkLl42HWcGJaWRtQ％2BaMh％2FojkHpPlQ3w5FpQ8z％2FLpj1OWXFAJRIXoj2k％2BfkWED6L5iRdOVqxmD0Kh％2FGl4u％2F7lJffw07ivVpysgDEKf7SzoKy4HRjcV1MDVd％2BXx％2BWmsbIujstKnu％2ByR6dsfw4PehvjQCUocf4XBdA％2BcPEqSDQh5VupH5iDalIyio6qfiB％2BkhMuIAmRjqi7Nc0u9bPF3JWK％2BaYamlixP3FiP5aoR4q4FyolUUctw6SgYEirY3Jr6egrxQDqxxhjM7qhoIIWpjGcm3S％2BMKMhKB％2BTKRUBimhhdYb3ZtSmLaOf2F2lgGrcItdjk0CbaBRb3Zt767IRgWpatDo3S％2BvyOjSN25G1HHOrcwuqyEdWtxFZl％2FW51QFldGkqu6eg1Ea9pJEHd9dTm1qD％2Fq9XIxtsVuoHPmPn04YaSurUvFRKChTU0kocpXK61siM％2Bgkoqhj％2BhjAfKn14zrfFlXyl％2BnkxWFdL4HS1Q78LrJJpfw2sL1PoquNq％2BjMCpIEzqm5eYCY1rn8I8J9ZgL9qw2i9dn2zdEqdvg6Nz1v7gNRduHwp8p6i％2FAOL3wuLB％2BgdXuVcl1sc5TC9owuNcK2U％2FRTUn％2FZKvfMCewWMLI9mL0NIMkkFCDRo9gJ5dhT6o1Up4tv3OF9Nf％2FYtLQQxSoSG9OOyH0AKXF％2FEKcKYcndzlh9BflirYzNraQMpMSHD60vr7jH5sbnTGUJmQmYvx3Oze4PtTj80gciYBLK0cx1bSXthL60I％2Fo1tYlKr40Sm0ZxDJcGQ％2FcRW5KdTh6rgjFQGty6b34P8PPXt06vJzwj0fKr2WhfJYP30gNrb29CBfpokwaSvzoBW％2FxZkCSF4r3pYPZ1CYIXgjAssHvagnjVl656RFw％2FTLCxGyVengix3H46％2BsXtQucgL％2FKOQBpQTTfBX％2BYd％2FuH8gsrWXXD8oA1AWQem8yj％​​2By7Z％2FarXQzbzJ％2B1r9XFX6tyiRQDXG0wg％2FsWpdclBtzmKoHpx5XfinfQEuIKpFcZ％2FhnEL5bmoRwXRMCwbKlCZ2QD1n8t5DFL9AjCtEaouJjK％2BcDs％2B8Cs％2FvByghUsoPASvaBdePxk％2BNhVehch％2FVYEPiCBIywMcsPgKrPAIZzuKRwTknsGgUJ％2FQiqFpDoxtjstplFmthOGqHT8e％2FtTmNkR6OxgoDVuQZJPeROtxG2jPHcAahanThRnxUdb3Vux3b3BjnGVWR2AeCdm％2B8A1R2％2BXfyYXUcB0lwAzfwJNOIGUcBVrHON6QgopA5Vln0oyJ9YQR6XJ3C12vKPPY8PxL4dYl8lKgGSsLSS4％2B0mIoAGI7S8QY8Zpk％2F3EzVMDng％2BT1fPkyB％2B％2FJc2wAd1KzyfppM8zSAFY68XxErkfw6y％2FKD3OfQqIUKQNzB6％2FThhmqkHqsrHC4P5NM3UNRkOD4SGXqVUbD1fduh2g0YkxuWDQAA89VbSqzbGvx1lxgEZ2ptAI1x7nrqjcDiK4bd4DhpHoT56lYNZVPsJWPoG9UFV9QCqDiuE2uAB1v7B4f8OHH4f59GrwBw0chDnYXs5j65qKxXiyKRHI5rOOdQqwojmbk3zHcHa％2F8p6LHXMuMGtzpibUXthTR6D9Ta0uzazI8VynLGdXIV2p4nUPgiwHdS6tACw1xGwHYBQY％2BR04XPHiR3DX9qJAqpJHWNIACwwd3PRMtrcSerfBKsDx31ykzcnt9jrtsHXq5G1PA％2FNxFZAXDqJuu％2FcgLma1Insewf％2B2pHPLaPGzNX9adZS96ujIbbAt1Zpsx0O7tCbsR5ZRYKgIy5t6gU5QAyQHqxID％2FtON1FlVTABMx％2BSXPzHJBfGnHDJOOLsfSTXPVTmBQAQaH8NP1kJLq9CVelNVdWXQ％2BokbSUxVHIxc9kGMI8XZqKSq87MLlT6y％2Fa93W1je3kFssOcW0lz6VzeLCDhIAmdEFYPkBW175ZcICXU5iMcv4EVq％2F3GyaVrkqMjSgoGDeQ6u7g4ZnI9T8HK％2f0的％2BASibJz7BybXMwiBaVYLxAAutU％2F1jYfuaF7Rksqzdn1OszvsqDMqFyN1N3wrOnObnGsvjWywvr3usnnv97egIq8kvOrv7vBjf4vMqVPPgdoPbn％2FwGSB1Nz&安培;压缩= 1&安培; ACCESS_TOKEN = 124024574287414％7C84a456d620314b6e92a16d8ff1c792dc&安培;格式= JSON

解决方案

TL;DR: 使用以下命令行来解码这样的 messages:

ipython -c "import zlib, base64, urllib; m='';zlib.decompress(base64.decodestring(urllib.unquote(m)))"

同时将 替换为 post 参数.

完整细节:

此请求使用多个编码器一个接一个，但所有使用的编码器都很容易被经验丰富的研究人员和可能有经验的网络开发人员识别.

通过消息POST参数中出现的字符，很容易识别格式是base64 encoding.但是，百分比字符 (%) 很突出，因为它们不是 base64 字符集的一部分.进一步检查后很容易看到百分号后面总是只跟随几个字符选择(%2B、%2F).这些是 url 编码的字符(分别是+"和/")，都是 base64 字符集的一部分.

因此，应该对该字符串进行 urldecoded 和 base64 解码，结果我们得到了一个更神秘的字符串，但幸运的是没有错误:

x\xda\xed\\mo\xe2H\x12\xfe+\xa7|\xba\x93\x02\xeaW\xb7;\xd2~<剪断>

字符串由可打印和不可打印的字符组成，但前两个字符 x\xda(或 \x78\xda)具有重要意义，如它们是 zlib 压缩流的标记.

例如，在您的消息中运行这一行看起来就像这样:

<预> <代码> NIR $ IPython的-cZLIB进口，BASE64，urllib的; M ='eNrtXG1v4kgS％2FiunfLqTAupXtzvSfiAxZInOZsmQEPt0sowxYGNj1jZDYLX326％2FaMBNICJMsZCajTUZRwO6XqvJT1c％2FTtuePE286dcP％2BydkJJgwRxgUjumCYnZyezMrjCD4VYRKcnGGmU0GIQKiKGEWUnZa9PweZ6o6qtIr％2B8U％2BmIYGEwP％2BCbv3gc％2BgH6％2BHPBdcb51rFuJCNCmsYuKJf6EZFq％2BlMN2pGDV0I6DLwkjBeuJs9Gb1gBqnXK3rDqFfAPKMi8UWtYvCaIKyGOZM16JkHeR6mk1Wf8xqqo4sGhuYNvcIouaicn2ukQhr8HLzQ5LlGlYFe4Z2c％2FeePkyTtz2JwUTkExyee8vdkHvTy1B8Hheunk0ngF65XFEEyLR6HRJOkyhETQp6eBPdFBoP％2BcTIdwxCE6IxSHWvs5M8％2FT5％2BbKBy6vwducD9N81kW7Bxdl4xvDD7M0tkUehZBXrhgZOjFysgCGrgQBD8Og4kys4zGhhGnT8xSg06DDCaEDqUpYZq7gyDou7NB6GZBP8jD4eRg8zmjz9h％2FgJm59zk40DJJBZI7LMvSOE5nhxq3CmSRpnERTh9ZujoFneJwEjzYnAVB7IIxCzdMptkK1bss1zHBSGxYXvYBT8NC9ThDu％2ByMQ7CpnMFPZ8pYaFX220of1vOQlJT3PU2ygAVSoCDQexj7cuB5PoGBklkB1j8ayXOfzjjycjdZlC3LNp％2FDYP605ySYPz4U5u6Xo％2BD3kUMnNKy％2Fy9BxRDgl6L0GjhCKtPcYOCw1LHWpi3cbOU0I％2Bh4jxwXXpIDL％2Bl4jR％2BHL％2B0xWiTSJEf3ekQsneeENMy9x02zoTULfzWe9b0WRYUQ2gpinswwYVjp​​wPX8VxyezJS5YiNXf8P6ZMH9JPqYLKAyA8cdE7KG1SwhCmoHrFUSpVmE65hXJiKzUmDwX9QuBGoZWzroekmANuCb0pPCLMMLu1jTghz8OJ0NYXMeBMj9YXC29bn9m311jP7kJW2Ez％2FPfF1dy％2BI％2FMeaYyb0VQ0k3h5Rxozu3vP％2B5dx5GOJ％2FKQReeRWnUf％2B5DaGPkvn7orA76B％2FKTOny9RY95YxXFrLOrIMe2EZTTIw6siM6sSM％2FLnZsZG5rBPLqN2bRkM3oyazDHPZMuDYr3NiR7W5Y9jEurSxZViRc2mFrc7VuHXZntvLm3tzeTuyl6NRq9tcOJGN7ChO7ATmjBqh1akRK7LnLaMxhvMwvjW2E5s1w3nYv7udOhdNrRn53InaBNou7K4zbnXgcxfGTG4jJ2kvra6JreUNjNskZqe9AHsX1rIG47eXpe1GfW5％2BupLgu％2FIb4ihnzSjFg％2FYvvyhWrrjQ3AXUFbNcIaX8DsE％2FjHsBJoXcxQo79U％2BdQ8nr57AfpK4fxLHrzYp0GkPy92bDAWB52％2BiV1niwe831FYT9kTcZ7jZdSkz2sf3TjXGUlAgH4dYxlbLFYqomvOhce％2F0wrfk％2BZE4n8EeTNE6Hi18％2FGb％2FVngY4Dn2vWCX52uDYm038kTvLvV6801hJgVNsqoe1yxCw30bpJNBPMXRL85WMw1X1LZyEBaSWux48gZOYy6rATEisqbKn3H％2Fq9Zd％2BE8BL2QlxGFAirlP40TQQjT1IXHWlJ31XtT45G3hxHjx0VQUJqrfqrWFRFZqmC45AnGJNf2i1crdspUtcZYKXhjGuYfqCoE1n％2BQiMLOC6rE7BylAUCtK7AsigdG1Wz57XHwYwc5HNwHAvDrLi67dcefb1246aCZpZZdKuS1eO605mSU％2BJaii5sQf67snRzJt％2FNfdM7MnBfpgp2ToLXciSwU7XBCZiExuDMIMppx7gfu0CrCqzWKVXPishujMP1XpXLk299F7Ns4J2FVW％2BUwq1nBaOpgXo1P4sW12MM03yPcZngRerjipVcj8Le8E％2B％2FS2FBgDbcORrd0j％2B0IfxZnmQVfo5qTwY％2Fj％2By05nHM09LgHgxHO8voKSFubrcJWz32F％2Fq8UnhxqnXD％2Fo7bdYZQZs2f％2BmyDt90lBbpTgs3x15F9wwyF2LAOWFSSp0gjT40g5WiGAFUONpj78N2Rz％2Fsu％2Bk02EEkaFVyjW9JgFfsczy9ojvCwqqUUV2KvcX1hRf3lUQ0CwYA9tEumxgVQtP32nQ0zjkHLrnOtcEs％2FpKGO5noptlfUDMJinmajU9eSkLl42HWcGJaWRtQ％2BaMh％2FojkHpPlQ3w5FpQ8z％2FLpj1OWXFAJRIXoj2k％2BfkWED6L5iRdOVqxmD0Kh％2FGl4u％2F7lJffw07ivVpysgDEKf7SzoKy4HRjcV1MDVd％2BXx％2BWmsbIujstKnu％2ByR6dsfw4PehvjQCUocf4XBdA％2BcPEqSDQh5VupH5iDalIyio6qfiB％2BkhMuIAmRjqi7Nc0u9bPF3JWK％2BaYamlixP3FiP5aoR4q4FyolUUctw6SgYEirY3Jr6egrxQDqxxhjM7qhoIIWpjGcm3S％2BMKMhKB％2BTKRUBimhhdYb3ZtSmLaOf2F2lgGrcItdjk0CbaBRb3Zt767IRgWpatDo3S％2BvyOjSN25G1HHOrcwuqyEdWtxFZl％2FW51QFldGkqu6eg1Ea9pJEHd9dTm1qD％2Fq9XIxtsVuoHPmPn04YaSurUvFRKChTU0kocpXK61siM％2Bgkoqhj％2BhjAfKn14zrfFlXyl％2BnkxWFdL4HS1Q78LrJJpfw2sL1PoquNq％2BjMCpIEzqm5eYCY1rn8I8J9ZgL9qw2i9dn2zdEqdvg6Nz1v7gNRduHwp8p6i％2FAOL3wuLB％2BgdXuVcl1sc5TC9owuNcK2U％2FRTUn％2FZKvfMCewWMLI9mL0NIMkkFCDRo9gJ5dhT6o1Up4tv3OF9Nf％2FYtLQQxSoSG9OOyH0AKXF％2FEKcKYcndzlh9BflirYzNraQMpMSHD60vr7jH5sbnTGUJmQmYvx3Oze4PtTj80gciYBLK0cx1bSXthL60I％2Fo1tYlKr40Sm0ZxDJcGQ％2FcRW5KdTh6rgjFQGty6b34P8PPXt06vJzwj0fKr2WhfJYP30gNrb29CBfpokwaSvzoBW％2FxZkCSF4r3pYPZ1CYIXgjAssHvagnjVl656RFw％2FTLCxGyVengix3H46％2BsXtQucgL％2FKOQBpQTTfBX％2BYd％2FuH8gsrWXXD8oA1AWQem8yj％​​2By7Z％2FarXQzbzJ％2B1r9XFX6tyiRQDXG0wg％2FsWpdclBtzmKoHpx5XfinfQEuIKpFcZ％2FhnEL5bmoRwXRMCwbKlCZ2QD1n8t5DFL9AjCtEaouJjK％2BcDs％2B8Cs％2FvByghUsoPASvaBdePxk％2BNhVehch％2FVYEPiCBIywMcsPgKrPAIZzuKRwTknsGgUJ％2FQiqFpDoxtjstplFmthOGqHT8e％2FtTmNkR6OxgoDVuQZJPeROtxG2jPHcAahanThRnxUdb3Vux3b3BjnGVWR2AeCdm％2B8A1R2％2BXfyYXUcB0lwAzfwJNOIGUcBVrHON6QgopA5Vln0oyJ9YQR6XJ3C12vKPPY8PxL4dYl8lKgGSsLSS4％2B0mIoAGI7S8QY8Zpk％2F3EzVMDng％2BT1fPkyB％2B％2FJc2wAd1KzyfppM8zSAFY68XxErkfw6y％2FKD3OfQqIUKQNzB6％2FThhmqkHqsrHC4P5NM3UNRkOD4SGXqVUbD1fduh2g0YkxuWDQAA89VbSqzbGvx1lxgEZ2ptAI1x7nrqjcDiK4bd4DhpHoT56lYNZVPsJWPoG9UFV9QCqDiuE2uAB1v7B4f8OHH4f59GrwBw0chDnYXs5j65qKxXiyKRHI5rOOdQqwojmbk3zHcHa％2F8p6LHXMuMGtzpibUXthTR6D9Ta0uzazI8VynLGdXIV2p4nUPgiwHdS6tACw1xGwHYBQY％2BR04XPHiR3DX9qJAqpJHWNIACwwd3PRMtrcSerfBKsDx31ykzcnt9jrtsHXq5G1PA％2FNxFZAXDqJuu％2FcgLma1Insewf％2B2pHPLaPGzNX9adZS96ujIbbAt1Zpsx0O7tCbsR5ZRYKgIy5t6gU5QAyQHqxID％2FtON1FlVTABMx％2BSXPzHJBfGnHDJOOLsfSTXPVTmBQAQaH8NP1kJLq9CVelNVdWXQ％2BokbSUxVHIxc9kGMI8XZqKSq87MLlT6y％2Fa93W1je3kFssOcW0lz6VzeLCDhIAmdEFYPkBW175ZcICXU5iMcv4EVq％2F3GyaVrkqMjSgoGDeQ6u7g4ZnI9T8HK％2f0的％2BASibJz7BybXMwiBaVYLxAAutU％2F1jYfuaF7Rksqzdn1OszvsqDMqFyN1N3wrOnObnGsvjWywvr3usnnv97egIq8kvOrv7vBjf4vMqVPPgdoPbn％2FwGSB1Nz';zlib.decompress(base64.decodestring(urllib.unquote(m)))"

最终结果是:

{"app_id":"124024574287414","uid":"0","time":1483722700.043034,"app_ver":"10.3.0 (46070771)","device_id":"6DC95-4FD1-8C8D-6A848DADA0C7","family_device_id":"43C4D2EE-8FDE-428D-91CA-D5A724A1549A","session_id":"BA0E0CF1-42F8-432C-BB62-3"data"module:""app","name":"websocket_connect_attempt","time":1483722692.504779,"extra":{"pk":"2284338164"}},{"module":"app","name":"ig_qe_exposure","time":1483722692.58945,"extra":{"group":"test_social_context_on_client","id":"2284338164","pk":"2284338164","experiment":"ig_ios_feed_},{"redesign""app","name":"ig_qe_exposure","time":1483722692.589543,"extra":{"group":"test","id":"2284338164","pk":"2284338164","experiment":"ig_ios_save"}},{"module":"app","name":"ig_qe_exposure","time":1483722692.593709,"extra":{"group":"rollout","id":"2284338164","pk":"2284338164","experiment":"ig_ios_save_feed_tooltip"}},{"module":"feed_timeline","name":"reel_tray_impression","time":1483722692.812107,"extra_position"{:0,"pk":"2284338164","live_reel_count":0,"tray_session_id":"4ba09935da694e4e970ee8b11c9faac2","muted_reel_count":0,"a_pk":"22843","re​​el_0:"2284","re​​el_0:0new_reel_count":0,"is_new_reel":1}},{"module":"feed_timeline","name":"reel_tray_impression","time":1483722692.817618,"extra":{"tray_position":0,"pk":"2284338164","live_reel_count":0,"tray_session_id":"4ba09935da694e4e970ee8b11c9faac2","muted_reel_count":0,"a_pk":"25025320","_reel_count:"reel_0,"is_new_reel":1}},{"module":"feed_timeline","name":"reel_tray_impression","time":1483722692.822306,"extra":{"tray_position":0,"pk":"2284338164","live_reel_count":0,"tray_session_id":"4ba09935da694e4e970ee8b11c9faac2","muted_reel_count":0,"a_pk":"196198987","has_my_reel":0,"_0_reel_reel":0,"_0_reel_reel_reel_0:1}},{"module":"feed_timeline","name":"reel_tray_impression","time":1483722692.826773,"extra":{"tray_position":0,"pk":"2284338164","live_reel_count":0,"tray_session_id":"4ba09935da694e4e970ee8b11c9faac2","muted_reel_count":0,"a_pk":"575697306","has_my_reel":0,"viewed_reel_count":0,"new_reel_count":"},"is_time_new:},"is_time_line:"},"is_time_line","name":"reel_tray_impression","time":1483722692.831488,"extra":{"tray_position":0,"pk":"2284338164","live_reel_count":0,"tray_session_id":"51"4ba09e709ee"4ba09emuted_reel_count":0,"a_pk":"290691036","has_my_reel":0,"viewed_reel_count":0,"new_reel_count":0,"is_new_reel":1}},{"module":"feed_timeline","name":"instagram_organic_sub_impression","time":1483722692.84102,"extra":{"source_of_action":"feed_timeline","m_t":1,"m_ix":0,"pk":"2284338164:","a_pk"1487230826" ， SESSION_ID": 2284338164_22006D1E-0336-4815-9429-A49B7EC70FD6"， m_pk": 1421627016431640101_1487230826"， tracking_token":eyJzaWduYXR1cmUiOiIiLCJwYXlsb2FkIjp7ImlzX2FuYWx5dGljc190cmFja2VkIjp0cnVlLCJzZXJ2ZXJfdG9rZW4iOiIxNDgzNzE0NDYyNDI2fDE0MjE2MjcwMTY0MzE2NDAxMDF8MjI4NDMzODE2NHw2YjAwZDY2NGY1NDNjZGNiOTJkOGQwYzUxMzVhYzhhOWIyZjY0YjlmYmIxNjFiNTA2NjYwODFkOWIxMDNkYmY4IiwidXVpZCI6Ijc5ZjQ2NTAyYWZkOTQ2NWVhYmVjZmQzNWM1NzU0YjI2MTQyMTYyNzAxNjQzMTY0MDEwMSJ9LCJ2ZXJzaW9uIjo1fQ =="， follow_status": 下面的"}}，{ 模块": 应用程序"， 名": ig_qe_exposure"， 时间":1483722692.841793， 多余":{ 组": TEST","id":"2284338164","pk":"2284338164","experiment":"ig_ios_feed_video_cell_autoplay_bugfix"}},{"module":"device","name":"connection_change","time":14837292692."额外":{"pk":"2284338164","connection":"wifi","connection_subtype":"CTRadioAccessTechnologyHSDPA"}},{"module":"application","name":"launch_usable","time":1483722692.932535,"额外":{"device":"iPhone8,1","os":"10.1.1","init_to_launch_ms":159.7147916691029,"pk":"2284338164",60533_164_now_6053333background_init":false,"init_to_active_ms":617.7668750024168,"init_to_usable_ms":891.4757916645613}},{"module":"application","name":"push_notification_setting","time":14024162"time":140"trages:{":true,"alerts":true,"sounds":true,"pk":"2284338164","app_state":"launch_usable","badge_number":0,"last_badge_number":0,"raw_setting":7}},{"module":"app","name":"direct_ui_perf","time":1483722692.971275,"extra":{"first_page":true,"result":"success","pk":"2284338164","view":"inbox","type":"request_time","total_duration":695}},{"module":"app","name":"realtime_subscribe_attempt","time":1483722692.976333,"extra":{"realtime_topic":"user-ds2-2284338164~2","pk":"2284338164","re​​adtime_false}"realtime_exists_al,{"module":"app","name":"content_loaded","time":1483722692.984203,"extra":{"content_type":"photo","pk":"2284338164","content_load_time":0.197655204399,"content_width":750}},{"module":"app","name":"websocket_did_open","time":1483722693.956506,"extra":{"pk":"2284338164"}},{"module":"app","name":"realtime_subscribed","time":1483722694.343897,"extra":{"pk":"2284338164","re​​altime_topic":"user-ds2-2284338164~2"}},{"module":"feed_timeline","name":"reel_tray_refresh","time":1483722694.437768,"extra":{"pk":"2284338164","live_reel_count":0,"tray_session_id":"5da09694e4e970ee8b11c9faac2","was_successful":true,"muted_reel_count":0,"tray_refresh_type":"network","viewed_reel_count":0,"new_reel_count":9,"tray_refresh4670},0s_16:06"16:05.0"module":"feed_timeline","name":"reel_tray_impression","time":1483722694.451732,"extra":{"tray_position":3,"pk":"2284338164","live_reel_count":0,"tray_id:"4ba09935da694e4e970ee8b11c9faac2","muted_reel_count":0,"a_pk":"1573917928","has_my_reel":1,"viewed_reel_count":0,"new_reel":"}reel_count"},"new_reel_count"}:9"feed_timeline","name":"instagram_main_feed_refresh","time":1483722694.63361,"extra":{"reason":"cold_start_fetch","pk":"2284338164","status_code":"200"}}"module":"app","name":"app_installations","time":1483722694.8347,"extra":{"pk":"2284338164","fbapp_installed":true}},{"module":"feed_timeline","name":"instagram_organic_impression","time":1483722695.036799,"extra":{"source_of_action":"feed_timeline","m_t":1,"m_ix":0,"pk":"2284338164","a_pk":"2263699430","session_id":"2284338164_22006D1E-0336-4815-9429-A49B7EC70FD6" ， m_pk": 1421834952577120803_2263699430"， tracking_token": eyJ2ZXJzaW9uIjo1LCJzaWduYXR1cmUiOiIiLCJwYXlsb2FkIjp7InNlcnZlcl90b2tlbiI6IjE0ODM3MjI2OTM5NzZ8MTQyMTgzNDk1MjU3NzEyMDgwM3wyMjg0MzM4MTY0fDEyNTgxMjQ3ODdmYWMzODA5N2RkM2M4MjhlNWUxNGFjMjcyOTUzNGRiMDVhNzk5NTViOTc0NWFjNGEwNTUxMGMiLCJpc19hbmFseXRpY3NfdHJhY2tlZCI6dHJ1ZSwidXVpZCI6ImE3MGIyZjIxNzNmZjQzMWNhMjdmNjFlMjdiNzk0MDgwMTQyMTgzNDk1MjU3NzEyMDgwMyJ9fQ =="， follow_status": 以下"}}，{ 模块": feed_timeline"，名称":"instagram_organic_time_spent","time":1483722695.036946,"extra":{"source_of_action":"feed_timeline","m_t":1,"pk":"2284338164","a_pk":"1486",23:2.195435047149658， m_pk": 1421627016431640101_1487230826"， tracking_token":eyJzaWduYXR1cmUiOiIiLCJwYXlsb2FkIjp7ImlzX2FuYWx5dGljc190cmFja2VkIjp0cnVlLCJzZXJ2ZXJfdG9rZW4iOiIxNDgzNzE0NDYyNDI2fDE0MjE2MjcwMTY0MzE2NDAxMDF8MjI4NDMzODE2NHw2YjAwZDY2NGY1NDNjZGNiOTJkOGQwYzUxMzVhYzhhOWIyZjY0YjlmYmIxNjFiNTA2NjYwODFkOWIxMDNkYmY4IiwidXVpZCI6Ijc5ZjQ2NTAyYWZkOTQ2NWVhYmVjZmQzNWM1NzU0YjI2MTQyMTYyNzAxNjQzMTY0MDEwMSJ9LCJ2ZXJzaW9uIjo1fQ =="， follow_status": 下面的"}}，{ 模块": feed_timeline"， 名": instagram_organic_sub_viewed_impression"， 时间":1483722695.036983， 多余":{ source_of_action": feed_timeline"follow_status": 以下"， M_T":1， a_pk": 1487230826"， m_pk": 1421627016431640101_1487230826"， PK": 2284338164"， tracking_token": eyJzaWduYXR1cmUiOiIiLCJwYXlsb2FkIjp7ImlzX2FuYWx5dGljc190cmFja2VkIjp0cnVlLCJzZXJ2ZXJfdG9rZW4iOiIxNDgzNzE0NDYyNDI2fDE0MjE2MjcwMTY0MzE2NDAxMDF8MjI4NDMzODE2NHw2YjAwZDY2NGY1NDNjZGNiOTJkOGQwYzUxMzVhYzhhOWIyZjY0YjlmYmIxNjFiNTA2NjYwODFkOWIxMDNkYmY4IiwidXVpZCI6Ijc5ZjQ2NTAyYWZkOTQ2NWVhYmVjZmQzNWM1NzU0YjI2MTQyMTYyNzAxNjQzMTY0MDEwMSJ9LCJ2ZXJzaW9uIjo1fQ =="}},{"module":"app","name":"content_loaded","time":1483722695.558961,"extra":{"content_type":"photo","pk":"2284338164","content_load_time":0.876256763666,"content_width":750}},{"module":"app","name":"content_loaded","time":1483722695.576639,"extra":{"content_type":"photo","pk":"2284338164","content_load_time":0.400949374998163,"content_width":750}},{"module":"feed_timeline","name":"instagram_organic_impression:","time"1483722696.305709，额外":{source_of_action":feed_timeline"，m_t":1，m_ix":1，pk":2284338164"，a_pk":204327608"，session_164d":2806431320336-4815-9429-A49B7EC70FD6" ， m_pk": 1421889687605301135_204327608"， tracking_token": eyJ2ZXJzaW9uIjo1LCJzaWduYXR1cmUiOiIiLCJwYXlsb2FkIjp7InNlcnZlcl90b2tlbiI6IjE0ODM3MjI2OTM5NzZ8MTQyMTg4OTY4NzYwNTMwMTEzNXwyMjg0MzM4MTY0fDY5ZTgwODY2NzkwMWU1YTdiMGEwM2NkYTRlNmQyYzNjNjNkY2M3NTZjMDIwNzE1OGQ2YTc0NTE1NDZhZjQ2OGIiLCJpc19hbmFseXRpY3NfdHJhY2tlZCI6dHJ1ZSwidXVpZCI6ImE3MGIyZjIxNzNmZjQzMWNhMjdmNjFlMjdiNzk0MDgwMTQyMTg4OTY4NzYwNTMwMTEzNSJ9fQ =="， follow_status": 以下"}}，{ 模块": hscroll_aymf_feed_unit"， 姓名":"recommended_user_impression","time":1483722696.32221,"extra":{"pk":"2284338164","uid":"2316545717","view":"hscroll_aymf_feed_unit","gorith":follower_algorithm"}},{"module":"hscroll_aymf_feed_unit","name":"recommended_user_impression","time":1483722696.326252,"extra":{"pk":"2284338164","uid":"3896"35267:"3896"35267hscroll_aymf_feed_unit","position":1,"algorithm":"followers_algorithm"}},{"module":"hscroll_aymf_feed_unit","name":"recommended_user_impression","time":1483722696,"p​​kex"7":"2284338164","uid":"2942400495","view":"hscroll_aymf_feed_unit","position":2,"algorithm":"page_rank_algorithm"}},{"module":"app","name":"content_loaded","time":1483722696.490827,"extra":{"content_type":"photo","pk":"2284338164","content_load_time":0.0478957499981334,"content_width":{79}"feed_timeline","name":"instagram_organic_time_spent","time":1483722697.295841,"extra":{"source_of_action":"feed_timeline","m_t":1,"m_ix":0,"pk":"2284"33811a_pk": 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I intercepted an HTTP request on Charles originating from iPhone to Instagram and here are the headers

POST /logging_client_events HTTP/1.1
Host: graph.instagram.com
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Connection: keep-alive
Accept: */*
User-Agent: Instagram 10.0.1 (iPhone8,1; iOS 10_1_1; en_IN; en-IN; en; scale=2.00; 750x1334) AppleWebKit/420+
Accept-Language: en-IN;q=1.0, hi-IN;q=0.9,
Content-Length: 1601
Accept-Encoding: gzip, deflate

There is a Post data as well in the request that is compressed. My question is how can I uncompress the Post data? Perhaps any method in NSData that can decompress?

EDIT: Here is the complete HTTP request

POST /logging_client_events HTTP/1.1
Host: graph.instagram.com
Content-Type: application/x-www-form-urlencoded; charset=UTF-8
Connection: keep-alive
Accept: */*
User-Agent: Instagram 10.3.0 (iPhone8,1; iOS 10_1_1; en_IN; en-IN; scale=2.00; gamut=normal; 750x1334) AppleWebKit/420+
Accept-Language: en-IN;q=1, hi-IN;q=0.9
Content-Length: 4585
Accept-Encoding: gzip, deflate

message=eNrtXG1v4kgS%2FiunfLqTAupXtzvSfiAxZInOZsmQEPt0sowxYGNj1jZDYLX326%2FaMBNICJMsZCajTUZRwO6XqvJT1c%2FTtuePE286dcP%2BydkJJgwRxgUjumCYnZyezMrjCD4VYRKcnGGmU0GIQKiKGEWUnZa9PweZ6o6qtIr%2B8U%2BmIYGEwP%2BCbv3gc%2BgH6%2BHPBdcb51rFuJCNCmsYuKJf6EZFq%2BlMN2pGDV0I6DLwkjBeuJs9Gb1gBqnXK3rDqFfAPKMi8UWtYvCaIKyGOZM16JkHeR6mk1Wf8xqqo4sGhuYNvcIouaicn2ukQhr8HLzQ5LlGlYFe4Z2c%2FeePkyTtz2JwUTkExyee8vdkHvTy1B8Hheunk0ngF65XFEEyLR6HRJOkyhETQp6eBPdFBoP%2BcTIdwxCE6IxSHWvs5M8%2FT5%2BbKBy6vwducD9N81kW7Bxdl4xvDD7M0tkUehZBXrhgZOjFysgCGrgQBD8Og4kys4zGhhGnT8xSg06DDCaEDqUpYZq7gyDou7NB6GZBP8jD4eRg8zmjz9h%2FgJm59zk40DJJBZI7LMvSOE5nhxq3CmSRpnERTh9ZujoFneJwEjzYnAVB7IIxCzdMptkK1bss1zHBSGxYXvYBT8NC9ThDu%2ByMQ7CpnMFPZ8pYaFX220of1vOQlJT3PU2ygAVSoCDQexj7cuB5PoGBklkB1j8ayXOfzjjycjdZlC3LNp%2FDYP605ySYPz4U5u6Xo%2BD3kUMnNKy%2Fy9BxRDgl6L0GjhCKtPcYOCw1LHWpi3cbOU0I%2Bh4jxwXXpIDL%2Bl4jR%2BHL%2B0xWiTSJEf3ekQsneeENMy9x02zoTULfzWe9b0WRYUQ2gpinswwYVjpwPX8VxyezJS5YiNXf8P6ZMH9JPqYLKAyA8cdE7KG1SwhCmoHrFUSpVmE65hXJiKzUmDwX9QuBGoZWzroekmANuCb0pPCLMMLu1jTghz8OJ0NYXMeBMj9YXC29bn9m311jP7kJW2Ez%2FPfF1dy%2Bi%2FMeaYyb0VQ0k3h5Rxozu3vP%2B5dx5GOJ%2FKQReeRWnUf%2B5DaGPkvn7orA76B%2FKTOny9RY95YxXFrLOrIMe2EZTTIw6siM6sSM%2FLnZsZG5rBPLqN2bRkM3oyazDHPZMuDYr3NiR7W5Y9jEurSxZViRc2mFrc7VuHXZntvLm3tzeTuyl6NRq9tcOJGN7ChO7ATmjBqh1akRK7LnLaMxhvMwvjW2E5s1w3nYv7udOhdNrRn53InaBNou7K4zbnXgcxfGTG4jJ2kvra6JreUNjNskZqe9AHsX1rIG47eXpe1GfW5%2BupLgu%2FIb4ihnzSjFg%2FYvvyhWrrjQ3AXUFbNcIaX8DsE%2FjHsBJoXcxQo79U%2BdQ8nr57AfpK4fxLHrzYp0GkPy92bDAWB52%2BiV1niwe831FYT9kTcZ7jZdSkz2sf3TjXGUlAgH4dYxlbLFYqomvOhce%2F0wrfk%2BZE4n8EeTNE6Hi18%2FGb%2FVngY4Dn2vWCX52uDYm038kTvLvV6801hJgVNsqoe1yxCw30bpJNBPMXRL85WMw1X1LZyEBaSWux48gZOYy6rATEisqbKn3H%2Fq9Zd%2BE8BL2QlxGFAirlP40TQQjT1IXHWlJ31XtT45G3hxHjx0VQUJqrfqrWFRFZqmC45AnGJNf2i1crdspUtcZYKXhjGuYfqCoE1n%2BQiMLOC6rE7BylAUCtK7AsigdG1Wz57XHwYwc5HNwHAvDrLi67dcefb1246aCZpZZdKuS1eO605mSU%2BJaii5sQf67snRzJt%2FNfdM7MnBfpgp2ToLXciSwU7XBCZiExuDMIMppx7gfu0CrCqzWKVXPishujMP1XpXLk299F7Ns4J2Fvw%2BUwq1nBaOpgXo1P4sW12MM03yPcZngRerjipVcj8Le8E%2B%2FS2FBgDbcORrd0j%2B0IfxZnmQVfo5qTwY%2Fj%2By05nHM09LgHgxHO8voKSFubrcJWz32F%2Fq8UnhxqnXD%2Fo7bdYZQZs2f%2BmyDt90lBbpTgs3x15F9wwyF2LAOWFSSp0gjT40g5WiGAFUONpj78N2Rz%2Fsu%2Bk02EEkaFVyjW9JgFfsczy9ojvCwqqUUV2KvcX1hRf3lUQ0CwYA9tEumxgVQtP32nQ0zjkHLrnOtcEs%2FpKGO5noptlfUDMJinmajU9eSkLl42HWcGJaWRtQ%2BaMh%2FojkHpPlQ3w5FpQ8z%2FLpj1OWXFAJRIXoj2k%2BfkWED6L5iRdOVqxmD0Kh%2FGl4u%2F7lJffw07ivVpysgDEKf7SzoKy4HRjcV1MDVd%2BXx%2BWmsbIujstKnu%2ByR6dsfw4PehvjQCUocf4XBdA%2BcPEqSDQh5VupH5iDalIyio6qfiB%2BkhMuIAmRjqi7Nc0u9bPF3JWK%2BaYamlixP3FiP5aoR4q4FyolUUctw6SgYEirY3Jr6egrxQDqxxhjM7qhoIIWpjGcm3S%2BMKMhKB%2BTKRUBimhhdYb3ZtSmLaOf2F2lgGrcItdjk0CbaBRb3Zt767IRgWpatDo3S%2BvyOjSN25G1HHOrcwuqyEdWtxFZl%2FW51QFldGkqu6eg1Ea9pJEHd9dTm1qD%2Fq9XIxtsVuoHPmPn04YaSurUvFRKChTU0kocpXK61siM%2Bgkoqhj%2BhjAfKn14zrfFlXyl%2BnkxWFdL4HS1Q78LrJJpfw2sL1PoquNq%2BjMCpIEzqm5eYCY1rn8I8J9ZgL9qw2i9dn2zdEqdvg6Nz1v7gNRduHwp8p6i%2FAOL3wuLB%2BgdXuVcl1sc5TC9owuNcK2U%2FRTUn%2FZKvfMCewWMLI9mL0NIMkkFCDRo9gJ5dhT6o1Up4tv3OF9Nf%2FYtLQQxSoSG9OOyH0AKXF%2FEKcKYcndzlh9BflirYzNraQMpMSHD60vr7jH5sbnTGUJmQmYvx3Oze4PtTj80gciYBLK0cx1bSXthL60I%2Fo1tYlKr40Sm0ZxDJcGQ%2FcRW5KdTh6rgjFQGty6b34P8PPXt06vJzwj0fKr2WhfJYP30gNrb29CBfpokwaSvzoBW%2FxZkCSF4r3pYPZ1CYIXgjAssHvagnjVl656RFw%2FTLCxGyVengix3H46%2BsXtQucgL%2FKOQBpQTTfBX%2BYd%2FuH8gsrWXXD8oA1AWQem8yj%2By7Z%2FarXQzbzJ%2B1r9XFX6tyiRQDXG0wg%2FsWpdclBtzmKoHpx5XfinfQEuIKpFcZ%2FhnEL5bmoRwXRMCwbKlCZ2QD1n8t5DFL9AjCtEaouJjK%2BcDs%2B8Cs%2FvByghUsoPASvaBdePxk%2BNhVehch%2FVYEPiCBIywMcsPgKrPAIZzuKRwTknsGgUJ%2FQiqFpDoxtjstplFmthOGqHT8e%2FtTmNkR6OxgoDVuQZJPeROtxG2jPHcAahanThRnxUdb3Vux3b3BjnGVWR2AeCdm%2B8A1R2%2BXfyYXUcB0lwAzfwJNOIGUcBVrHON6QgopA5Vln0oyJ9YQR6XJ3C12vKPPY8PxL4dYl8lKgGSsLSS4%2B0mIoAGI7S8QY8Zpk%2F3EzVMDng%2BT1fPkyB%2B%2FJc2wAd1KzyfppM8zSAFY68XxErkfw6y%2FKD3OfQqIUKQNzB6%2FThhmqkHqsrHC4P5NM3UNRkOD4SGXqVUbD1fduh2g0YkxuWDQAA89VbSqzbGvx1lxgEZ2ptAI1x7nrqjcDiK4bd4DhpHoT56lYNZVPsJWPoG9UFV9QCqDiuE2uAB1v7B4f8OHH4f59GrwBw0chDnYXs5j65qKxXiyKRHI5rOOdQqwojmbk3zHcHa%2F8p6LHXMuMGtzpibUXthTR6D9Ta0uzazI8VynLGdXIV2p4nUPgiwHdS6tACw1xGwHYBQY%2BR04XPHiR3DX9qJAqpJHWNIACwwd3PRMtrcSerfBKsDx31ykzcnt9jrtsHXq5G1PA%2FNxFZAXDqJuu%2FcgLma1Insewf%2B2pHPLaPGzNX9adZS96ujIbbAt1Zpsx0O7tCbsR5ZRYKgIy5t6gU5QAyQHqxID%2FtON1FlVTABMx%2BSXPzHJBfGnHDJOOLsfSTXPVTmBQAQaH8NP1kJLq9CVelNVdWXQ%2BokbSUxVHIxc9kGMI8XZqKSq87MLlT6y%2Fa93W1je3kFssOcW0lz6VzeLCDhIAmdEFYPkBW175ZcICXU5iMcv4EVq%2F3GyaVrkqMjSgoGDeQ6u7g4ZnI9T8HK%2F0%2BASibJz7BybXMwiBaVYLxAAutU%2F1jYfuaF7Rksqzdn1OszvsqDMqFyN1N3wrOnObnGsvjWywvr3usnnv97egIq8kvOrv7vBjf4vMqVPPgdoPbn%2FwGSB1Nz&compressed=1&access_token=124024574287414%7C84a456d620314b6e92a16d8ff1c792dc&format=json

解决方案

TL;DR: use the following command line to decode such messages:

ipython -c "import zlib, base64, urllib; m='<message>';zlib.decompress(base64.decodestring(urllib.unquote(m)))"

While replacing <message> with the post parameter.

Full details:

This request uses several encoders one on top of another, but all encoders used are easily recognisable by an experienced researcher and probably experienced web developer.

By the characters appearing in the message POST argument, it's easy to identify the format is base64 encoding. However, percent characters (%) stand out as they're not part of the base64 character set. After further review it is easy to see a percent sign is always followed by only a few selection of characters (%2B, %2F). These are url encoded characters (specifically '+' and '/', respectively), both part of the base64 character set.

Thus, that string should be urldecoded and then base64 decoded, and we end up getting a more cryptic string as a result, but luckily no errors:

x\xda\xed\\mo\xe2H\x12\xfe+\xa7|\xba\x93\x02\xeaW\xb7;\xd2~
<snip>

The string consists of both printable and non-printable characters, but the first two characters, x\xda (or \x78\xda) have an important meaning as they're markers for a zlib compressed stream.

For example, running that one-line with your message would look exactly like that:

nir$ ipython -c "import zlib, base64, urllib; m='eNrtXG1v4kgS%2FiunfLqTAupXtzvSfiAxZInOZsmQEPt0sowxYGNj1jZDYLX326%2FaMBNICJMsZCajTUZRwO6XqvJT1c%2FTtuePE286dcP%2BydkJJgwRxgUjumCYnZyezMrjCD4VYRKcnGGmU0GIQKiKGEWUnZa9PweZ6o6qtIr%2B8U%2BmIYGEwP%2BCbv3gc%2BgH6%2BHPBdcb51rFuJCNCmsYuKJf6EZFq%2BlMN2pGDV0I6DLwkjBeuJs9Gb1gBqnXK3rDqFfAPKMi8UWtYvCaIKyGOZM16JkHeR6mk1Wf8xqqo4sGhuYNvcIouaicn2ukQhr8HLzQ5LlGlYFe4Z2c%2FeePkyTtz2JwUTkExyee8vdkHvTy1B8Hheunk0ngF65XFEEyLR6HRJOkyhETQp6eBPdFBoP%2BcTIdwxCE6IxSHWvs5M8%2FT5%2BbKBy6vwducD9N81kW7Bxdl4xvDD7M0tkUehZBXrhgZOjFysgCGrgQBD8Og4kys4zGhhGnT8xSg06DDCaEDqUpYZq7gyDou7NB6GZBP8jD4eRg8zmjz9h%2FgJm59zk40DJJBZI7LMvSOE5nhxq3CmSRpnERTh9ZujoFneJwEjzYnAVB7IIxCzdMptkK1bss1zHBSGxYXvYBT8NC9ThDu%2ByMQ7CpnMFPZ8pYaFX220of1vOQlJT3PU2ygAVSoCDQexj7cuB5PoGBklkB1j8ayXOfzjjycjdZlC3LNp%2FDYP605ySYPz4U5u6Xo%2BD3kUMnNKy%2Fy9BxRDgl6L0GjhCKtPcYOCw1LHWpi3cbOU0I%2Bh4jxwXXpIDL%2Bl4jR%2BHL%2B0xWiTSJEf3ekQsneeENMy9x02zoTULfzWe9b0WRYUQ2gpinswwYVjpwPX8VxyezJS5YiNXf8P6ZMH9JPqYLKAyA8cdE7KG1SwhCmoHrFUSpVmE65hXJiKzUmDwX9QuBGoZWzroekmANuCb0pPCLMMLu1jTghz8OJ0NYXMeBMj9YXC29bn9m311jP7kJW2Ez%2FPfF1dy%2Bi%2FMeaYyb0VQ0k3h5Rxozu3vP%2B5dx5GOJ%2FKQReeRWnUf%2B5DaGPkvn7orA76B%2FKTOny9RY95YxXFrLOrIMe2EZTTIw6siM6sSM%2FLnZsZG5rBPLqN2bRkM3oyazDHPZMuDYr3NiR7W5Y9jEurSxZViRc2mFrc7VuHXZntvLm3tzeTuyl6NRq9tcOJGN7ChO7ATmjBqh1akRK7LnLaMxhvMwvjW2E5s1w3nYv7udOhdNrRn53InaBNou7K4zbnXgcxfGTG4jJ2kvra6JreUNjNskZqe9AHsX1rIG47eXpe1GfW5%2BupLgu%2FIb4ihnzSjFg%2FYvvyhWrrjQ3AXUFbNcIaX8DsE%2FjHsBJoXcxQo79U%2BdQ8nr57AfpK4fxLHrzYp0GkPy92bDAWB52%2BiV1niwe831FYT9kTcZ7jZdSkz2sf3TjXGUlAgH4dYxlbLFYqomvOhce%2F0wrfk%2BZE4n8EeTNE6Hi18%2FGb%2FVngY4Dn2vWCX52uDYm038kTvLvV6801hJgVNsqoe1yxCw30bpJNBPMXRL85WMw1X1LZyEBaSWux48gZOYy6rATEisqbKn3H%2Fq9Zd%2BE8BL2QlxGFAirlP40TQQjT1IXHWlJ31XtT45G3hxHjx0VQUJqrfqrWFRFZqmC45AnGJNf2i1crdspUtcZYKXhjGuYfqCoE1n%2BQiMLOC6rE7BylAUCtK7AsigdG1Wz57XHwYwc5HNwHAvDrLi67dcefb1246aCZpZZdKuS1eO605mSU%2BJaii5sQf67snRzJt%2FNfdM7MnBfpgp2ToLXciSwU7XBCZiExuDMIMppx7gfu0CrCqzWKVXPishujMP1XpXLk299F7Ns4J2Fvw%2BUwq1nBaOpgXo1P4sW12MM03yPcZngRerjipVcj8Le8E%2B%2FS2FBgDbcORrd0j%2B0IfxZnmQVfo5qTwY%2Fj%2By05nHM09LgHgxHO8voKSFubrcJWz32F%2Fq8UnhxqnXD%2Fo7bdYZQZs2f%2BmyDt90lBbpTgs3x15F9wwyF2LAOWFSSp0gjT40g5WiGAFUONpj78N2Rz%2Fsu%2Bk02EEkaFVyjW9JgFfsczy9ojvCwqqUUV2KvcX1hRf3lUQ0CwYA9tEumxgVQtP32nQ0zjkHLrnOtcEs%2FpKGO5noptlfUDMJinmajU9eSkLl42HWcGJaWRtQ%2BaMh%2FojkHpPlQ3w5FpQ8z%2FLpj1OWXFAJRIXoj2k%2BfkWED6L5iRdOVqxmD0Kh%2FGl4u%2F7lJffw07ivVpysgDEKf7SzoKy4HRjcV1MDVd%2BXx%2BWmsbIujstKnu%2ByR6dsfw4PehvjQCUocf4XBdA%2BcPEqSDQh5VupH5iDalIyio6qfiB%2BkhMuIAmRjqi7Nc0u9bPF3JWK%2BaYamlixP3FiP5aoR4q4FyolUUctw6SgYEirY3Jr6egrxQDqxxhjM7qhoIIWpjGcm3S%2BMKMhKB%2BTKRUBimhhdYb3ZtSmLaOf2F2lgGrcItdjk0CbaBRb3Zt767IRgWpatDo3S%2BvyOjSN25G1HHOrcwuqyEdWtxFZl%2FW51QFldGkqu6eg1Ea9pJEHd9dTm1qD%2Fq9XIxtsVuoHPmPn04YaSurUvFRKChTU0kocpXK61siM%2Bgkoqhj%2BhjAfKn14zrfFlXyl%2BnkxWFdL4HS1Q78LrJJpfw2sL1PoquNq%2BjMCpIEzqm5eYCY1rn8I8J9ZgL9qw2i9dn2zdEqdvg6Nz1v7gNRduHwp8p6i%2FAOL3wuLB%2BgdXuVcl1sc5TC9owuNcK2U%2FRTUn%2FZKvfMCewWMLI9mL0NIMkkFCDRo9gJ5dhT6o1Up4tv3OF9Nf%2FYtLQQxSoSG9OOyH0AKXF%2FEKcKYcndzlh9BflirYzNraQMpMSHD60vr7jH5sbnTGUJmQmYvx3Oze4PtTj80gciYBLK0cx1bSXthL60I%2Fo1tYlKr40Sm0ZxDJcGQ%2FcRW5KdTh6rgjFQGty6b34P8PPXt06vJzwj0fKr2WhfJYP30gNrb29CBfpokwaSvzoBW%2FxZkCSF4r3pYPZ1CYIXgjAssHvagnjVl656RFw%2FTLCxGyVengix3H46%2BsXtQucgL%2FKOQBpQTTfBX%2BYd%2FuH8gsrWXXD8oA1AWQem8yj%2By7Z%2FarXQzbzJ%2B1r9XFX6tyiRQDXG0wg%2FsWpdclBtzmKoHpx5XfinfQEuIKpFcZ%2FhnEL5bmoRwXRMCwbKlCZ2QD1n8t5DFL9AjCtEaouJjK%2BcDs%2B8Cs%2FvByghUsoPASvaBdePxk%2BNhVehch%2FVYEPiCBIywMcsPgKrPAIZzuKRwTknsGgUJ%2FQiqFpDoxtjstplFmthOGqHT8e%2FtTmNkR6OxgoDVuQZJPeROtxG2jPHcAahanThRnxUdb3Vux3b3BjnGVWR2AeCdm%2B8A1R2%2BXfyYXUcB0lwAzfwJNOIGUcBVrHON6QgopA5Vln0oyJ9YQR6XJ3C12vKPPY8PxL4dYl8lKgGSsLSS4%2B0mIoAGI7S8QY8Zpk%2F3EzVMDng%2BT1fPkyB%2B%2FJc2wAd1KzyfppM8zSAFY68XxErkfw6y%2FKD3OfQqIUKQNzB6%2FThhmqkHqsrHC4P5NM3UNRkOD4SGXqVUbD1fduh2g0YkxuWDQAA89VbSqzbGvx1lxgEZ2ptAI1x7nrqjcDiK4bd4DhpHoT56lYNZVPsJWPoG9UFV9QCqDiuE2uAB1v7B4f8OHH4f59GrwBw0chDnYXs5j65qKxXiyKRHI5rOOdQqwojmbk3zHcHa%2F8p6LHXMuMGtzpibUXthTR6D9Ta0uzazI8VynLGdXIV2p4nUPgiwHdS6tACw1xGwHYBQY%2BR04XPHiR3DX9qJAqpJHWNIACwwd3PRMtrcSerfBKsDx31ykzcnt9jrtsHXq5G1PA%2FNxFZAXDqJuu%2FcgLma1Insewf%2B2pHPLaPGzNX9adZS96ujIbbAt1Zpsx0O7tCbsR5ZRYKgIy5t6gU5QAyQHqxID%2FtON1FlVTABMx%2BSXPzHJBfGnHDJOOLsfSTXPVTmBQAQaH8NP1kJLq9CVelNVdWXQ%2BokbSUxVHIxc9kGMI8XZqKSq87MLlT6y%2Fa93W1je3kFssOcW0lz6VzeLCDhIAmdEFYPkBW175ZcICXU5iMcv4EVq%2F3GyaVrkqMjSgoGDeQ6u7g4ZnI9T8HK%2F0%2BASibJz7BybXMwiBaVYLxAAutU%2F1jYfuaF7Rksqzdn1OszvsqDMqFyN1N3wrOnObnGsvjWywvr3usnnv97egIq8kvOrv7vBjf4vMqVPPgdoPbn%2FwGSB1Nz'; zlib.decompress(base64.decodestring(urllib.unquote(m)))"

Final result is:

{"app_id":"124024574287414","uid":"0","time":1483722700.043034,"app_ver":"10.3.0 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