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Is removing semi-colons an effective defense against SQL injection?

So obviously there is a security error if I have some code like this

execute("Select * where {} = {}".format(input1, input2))

As someone can simply, for input1, send in 1=1; DROP Table Users-- and kill my data. I’m unable to send the inputs as parameters, so I will instead be sanitizing them.

My question is, if I remove semicolons from any input string, can any SQL injection occur, and what would this look like?

Iteratively Build a Summary Dataset in an Effective Way

This is a problem I find a lot!! Can I achieve this goal without consuming so much time?

My code below achieves what I want it to achieve. However, I believe it could be a lot more efficient and Pythonic.

PROBLEM: I want to extract summary data from a larger dataset and I only know how to do so utilizing next For loops. For example, I have a large dataset containing golf data, and I would like to extract summary statistics for the individual golf holes.

This code creates a scoring distribution and mean score for each Season-Hole-Round-Score vs. Par combination (48 rows in total).

import numpy as np import pandas as pd import itertools  seasons = [2001,2001,2001,2001,2002,2002,2002,2002] holes = [1,1,2,2,1,1,2,2] rounds = [3,4,3,4,3,4,3,4] scores = [1,-1,0,0,0,1,-1,1] # actual scores vs. par  df = pd.DataFrame({'season' : seasons, 'hole': holes, 'round':rounds, 'score': scores})   all_seasons = set(seasons); all_holes = set(holes);  all_scores = [-1,0,1] all_rounds = ["R3","R4","Weekend"] #some averages combine rounds round_iter = np.arange(0,4) #position of rounds list round_ids = [[3],[4],[3,4]] # weekend incldues rounds 3 and 4  hold_list = [] #blank list  for season,round,hole in itertools.product(all_seasons,round_iter,all_holes):      hold_data = df[((df['season'] == season) & (df['hole'] == hole))     & (df['round'].isin(round_ids[round-1]))]      mean_score = hold_data['score'].mean()     vspar_distro = hold_data['score'].value_counts().to_dict()     for score in all_scores:         count_score = 0         if score in vspar_distro:             count_score = vspar_distro[score]         hold_list.append([season,all_rounds[round-1]                         ,hole,mean_score,score,count_score])   historical_df = pd.DataFrame(hold_list,columns              = ['season','round','hole','mean_score','vspar_score','count']) 

This produces the df that I desire (here are the first 5 rows), but applying this to a file with 100k+ records takes a long time and I believe there is a more efficient way. Thanks!

   season    round  hole  mean_score  vspar_score  count 0    2001  Weekend     1         0.0           -1      1 1    2001  Weekend     1         0.0            0      0 2    2001  Weekend     1         0.0            1      1 3    2001  Weekend     2         0.0           -1      0 4    2001  Weekend     2         0.0            0      2 

Effective message dispatching

I have some code, that works fine. However, I know there is a lot of code duplication and C-style programming. In the code example there only is a ChildOneDispatcher, in reality there are more child classes and case options.

The question is how to optimize/refactor this code best following c++11-c++17. I believe a big part of the duplication, could be solved by using a template. But I am not sure how implement this.

class BaseDispatcher { public:     BaseDispatcher()          = default;     virtual ~BaseDispatcher() = default;      result_t Init(uint8_t idx)     {         msgHandler.Init(idx);     };      void Execute(MainControl &ctrl)     {         if (msgHandler.RxMsg(msg))         {         switch (msg.msgID)         {             case REQ_PING:                 HandlePing(msg);                 break;             case REQ_VERSION:                 HandleVersion(msg);                 break;             default:                 SpecificExecute(msg, ctrl);         }     };  protected:     void HandlePing(const MsgInfo &msg)     {         txMsg = msgHandler.ReserveMsg(msg.msgID, sizeof(DefaultMsg_t));          if (nullptr != txMsg.msgBuf)         {             auto *response = (DefaultMsg_t *)txMsg.msgBuf;             response->ack = htons(static_cast<uint16_t>(Reply::ACCEPTED));             msgHandler.SendMsg(txMsg);             mainCtrl->GetConsole().OutputEnable();         }     };     void HandleVersion(const MsgInfo &msg)     {         txMsg = msgHandler.ReserveMsg(msg.msgID, sizeof(VersionInfoMsg_t));          if (nullptr != txMsg.msgBuf)         {             auto *response = (VersionInfoMsg_t *)txMsg.msgBuf;             memset(response->name, 0, 32);             response->svnRevision  = htons(svnRevision);             uint8_t sl = (uint8_t)strlen(sw);             memcpy(response->name, sw, sl <= 32 ? sl : 32);             msgHandler.SendMsg(txMsg);         }     };     void HandleUnknown(const MsgInfo &msg)     {         txMsg = msgHandler.ReserveMsg(msg.msgID, sizeof(DefaultMsg_t));          if (nullptr != txMsg.msgBuf)         {             auto *response = (DefaultMsg_t *)txMsg.msgBuf;             response->ack = htons(static_cast<uint16_t>(Reply::UNKNOWN_REQ));             msgHandler.SendMsg(txMsg);         }     };     virtual void SpecificExecute(const MsgInfo &msg, MainControl &ctrl);  protected:     MsgInfo         txMsg;     MsgHandler      msgHandler; };   class ChildOneDispatcher : public BaseDispatcher {     public:         ChildOneDispatcher ()          = default;         virtual ~ChildOneDispatcher () = default;      void SpecificExecute(const MsgInfo &msg, MainControl &ctrl) override     {         switch (msg.msgID)         {             case INFO_TEMP:                 HandleTemperature(msg, ctrl);                 break;             default:                 HandleUnknown(msg);         }     };      protected:         void HandleTemperature(const MsgInfo &msg, MainControl &ctrl)         {             float temperature = (float)ntohl(*(uint16_t*)msg.msgBuf) / 10;             ctrl.GetRFMonitor().SetTemperature(temperature);         }; };  Class MainController() {     public:         Execute()         {             dispatcher.Execute(*this);         }     protected:         ChildOneDispatcher   dispatcher; } ``` 

Effective message dispatching

I have some code, that works fine. However, I know there is a lot of code duplication and C-style programming. In the code example there only is a ChildOneDispatcher, in reality there are more child classes and case options.

The question is how to optimize/refactor this code best following c++11-c++17. I believe a big part of the duplication, could be solved by using a template. But I am not sure how implement this.

class BaseDispatcher { public:     BaseDispatcher()          = default;     virtual ~BaseDispatcher() = default;      result_t Init(uint8_t idx)     {         msgHandler.Init(idx);     };      void Execute(MainControl &ctrl)     {         if (msgHandler.RxMsg(msg))         {         switch (msg.msgID)         {             case REQ_PING:                 HandlePing(msg);                 break;             case REQ_VERSION:                 HandleVersion(msg);                 break;             default:                 SpecificExecute(msg, ctrl);         }     };  protected:     void HandlePing(const MsgInfo &msg)     {         txMsg = msgHandler.ReserveMsg(msg.msgID, sizeof(DefaultMsg_t));          if (nullptr != txMsg.msgBuf)         {             auto *response = (DefaultMsg_t *)txMsg.msgBuf;             response->ack = htons(static_cast<uint16_t>(Reply::ACCEPTED));             msgHandler.SendMsg(txMsg);             mainCtrl->GetConsole().OutputEnable();         }     };     void HandleVersion(const MsgInfo &msg)     {         txMsg = msgHandler.ReserveMsg(msg.msgID, sizeof(VersionInfoMsg_t));          if (nullptr != txMsg.msgBuf)         {             auto *response = (VersionInfoMsg_t *)txMsg.msgBuf;             memset(response->name, 0, 32);             response->svnRevision  = htons(svnRevision);             uint8_t sl = (uint8_t)strlen(sw);             memcpy(response->name, sw, sl <= 32 ? sl : 32);             msgHandler.SendMsg(txMsg);         }     };     void HandleUnknown(const MsgInfo &msg)     {         txMsg = msgHandler.ReserveMsg(msg.msgID, sizeof(DefaultMsg_t));          if (nullptr != txMsg.msgBuf)         {             auto *response = (DefaultMsg_t *)txMsg.msgBuf;             response->ack = htons(static_cast<uint16_t>(Reply::UNKNOWN_REQ));             msgHandler.SendMsg(txMsg);         }     };     virtual void SpecificExecute(const MsgInfo &msg, MainControl &ctrl);  protected:     MsgInfo         txMsg;     MsgHandler      msgHandler; };   class ChildOneDispatcher : public BaseDispatcher {     public:         ChildOneDispatcher ()          = default;         virtual ~ChildOneDispatcher () = default;      void SpecificExecute(const MsgInfo &msg, MainControl &ctrl) override     {         switch (msg.msgID)         {             case INFO_TEMP:                 HandleTemperature(msg, ctrl);                 break;             default:                 HandleUnknown(msg);         }     };      protected:         void HandleTemperature(const MsgInfo &msg, MainControl &ctrl)         {             float temperature = (float)ntohl(*(uint16_t*)msg.msgBuf) / 10;             ctrl.GetRFMonitor().SetTemperature(temperature);         }; };  Class MainController() {     public:         Execute()         {             dispatcher.Execute(*this);         }     protected:         ChildOneDispatcher   dispatcher; } ``` 

What is the best, most effective “Tank” build in D&D 5e? [on hold]

I’m playing in a group that consists mostly of “1st time” players, and I though it would be fun to play the “Tank” role, considering almost every other time I either play the Front-liner DPS or the Back-line healer, I thought that this would be a nice change of pace.

I was wondering what build you see as the “Best” or “Most Efficient” in the tank role. I’ve heard the standard Moon Druid build, and that doesn’t interest me because I’ve played a lot of druid. I am looking for something new, that’s why I was originally planning a straight Barbarian Build: but I’m not too sure what’s best.

What is the most effective Tank build in D&D 5e?

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