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Discussion of article "Using WinInet in MQL5. Part 2: POST Requests and Files" - page 2

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In the tester, it crashes here:

if(!https_flag)
           hRequest=HttpOpenRequestW(hConnect, req.stVerb, req.stObject, Vers, nill, 0, INTERNET_FLAG_KEEP_CONNECTION|INTERNET_FLAG_RELOAD|INTERNET_FLAG_PRAGMA_NOCACHE, 0); 
        else
           hRequest=HttpOpenRequestW(hConnect, req.stVerb, req.stObject, Vers, nill, 0, INTERNET_FLAG_KEEP_CONNECTION|INTERNET_FLAG_RELOAD|INTERNET_FLAG_PRAGMA_NOCACHE|INTERNET_FLAG_SECURE, 0);

Error:

2018.09.16 11:11:23.242 2017.01.01 00:00:00   Access violation at 0x00007FFF798662F9 read to 0x0000009500000000 in 'wininet.dll'
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660E0 48895C2418        mov        [rsp+0x18], rbx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660E5 48894C2408        mov        [rsp+0x8], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660EA 55                push       rbp
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660EB 56                push       rsi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660EC 57                push       rdi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660ED 4154              push       r12
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660EF 4155              push       r13
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660F1 4156              push       r14
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660F3 4157              push       r15
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660F5 488D6C24B0        lea        rbp, [rsp-0x50]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798660FA 4881EC50010000    sub        rsp, 0x150
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866101 4D8BF9            mov        r15, r9
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866104 4D8BF0            mov        r14, r8
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866107 488BFA            mov        rdi, rdx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986610A F6056B40380002    test       byte [rip+0x38406b], 0x2
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866111 0F85DF920700      jnz        dword 0x7fff798df3f6
2018.09.16 11:11:23.248 2017.01.01 00:00:00   
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866117 33C9              xor        ecx, ecx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866119 33D2              xor        edx, edx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986611B 448D4158          lea        r8d, [rcx+0x58]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986611F 894C2468          mov        [rsp+0x68], ecx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866123 48894C2450        mov        [rsp+0x50], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866128 48894D80          mov        [rbp-0x80], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986612C 48894DB8          mov        [rbp-0x48], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866130 48894C2470        mov        [rsp+0x70], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866135 48894DD0          mov        [rbp-0x30], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866139 48894DA8          mov        [rbp-0x58], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986613D 448BE9            mov        r13d, ecx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866140 48894C2460        mov        [rsp+0x60], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866145 66898D98000000    mov        [rbp+0x98], cx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986614C 894C2458          mov        [rsp+0x58], ecx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866150 48894D90          mov        [rbp-0x70], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866154 894C245C          mov        [rsp+0x5c], ecx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866158 48894D88          mov        [rbp-0x78], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986615C 48894D98          mov        [rbp-0x68], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866160 488D4DF0          lea        rcx, [rbp-0x10]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866164 E8F7B3F8FF        call       0x7fff797f1560  ; Ñ; (wininet.dll)
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866169 FF1511D23A00      call       qword near [rip+0x3ad211]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986616F 8B0D33313800      mov        ecx, [rip+0x383133]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866175 8BF0              mov        esi, eax
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866177 FF1553D33A00      call       qword near [rip+0x3ad353]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986617D 488BD8            mov        rbx, rax
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866180 4885C0            test       rax, rax
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866183 0F84FAE5FBFF      jz         dword 0x7fff79824783
2018.09.16 11:11:23.248 2017.01.01 00:00:00   
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866189 8BCE              mov        ecx, esi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986618B FF15B7D23A00      call       qword near [rip+0x3ad2b7]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866191 33F6              xor        esi, esi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866193 4885DB            test       rbx, rbx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF79866196 0F84E7920700      jz         dword 0x7fff798df483
2018.09.16 11:11:23.248 2017.01.01 00:00:00   
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF7986619C 488B4B30          mov        rcx, [rbx+0x30]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661A0 488B4328          mov        rax, [rbx+0x28]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661A4 48897328          mov        [rbx+0x28], rsi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661A8 48894DB0          mov        [rbp-0x50], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661AC 488B4B38          mov        rcx, [rbx+0x38]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661B0 48897330          mov        [rbx+0x30], rsi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661B4 48894DA0          mov        [rbp-0x60], rcx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661B8 8B4B40            mov        ecx, [rbx+0x40]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661BB 48897338          mov        [rbx+0x38], rsi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661BF 894C2478          mov        [rsp+0x78], ecx
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661C3 488B4B50          mov        rcx, [rbx+0x50]
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661C7 897340            mov        [rbx+0x40], esi
2018.09.16 11:11:23.248 2017.01.01 00:00:00                 00007FFF798661CA 48894DC8          mov        [rbp-0x38], rcx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661CE 48897350          mov        [rbx+0x50], rsi
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661D2 488945E0          mov        [rbp-0x20], rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661D6 BAFFFFFFFF        mov        edx, 0xffffffff
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661DB 4885FF            test       rdi, rdi
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661DE 0F84AA000000      jz         dword 0x7fff7986628e
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661E4 4883C8FF          or         rax, 0xff
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661E8 0F1F0400          nop        [rax+rax]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661EC 48FFC0            inc        rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661EF 6644392C47        cmp        [rdi+rax*2], r13W
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661F4 75F6              jnz        0x7fff798661ec
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661F6 4C8BE6            mov        r12, rsi
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661F9 483BC2            cmp        rax, rdx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798661FC 0F8730930700      ja         dword 0x7fff798df532
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866202 8D4801            lea        ecx, [rax+0x1]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866205 3BC8              cmp        ecx, eax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866207 0F8225930700      jb         dword 0x7fff798df532
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986620D 8BD9              mov        ebx, ecx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986620F 4803DB            add        rbx, rbx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866212 483BDA            cmp        rbx, rdx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866215 0F8717930700      ja         dword 0x7fff798df532
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986621B 488B0DCE323800    mov        rcx, [rip+0x3832ce]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866222 448BC3            mov        r8d, ebx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866225 33D2              xor        edx, edx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866227 895DB8            mov        [rbp-0x48], ebx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986622A FF1530D13A00      call       qword near [rip+0x3ad130]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866230 4C8BE0            mov        r12, rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866233 48894580          mov        [rbp-0x80], rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866237 488945C0          mov        [rbp-0x40], rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986623B 4885C0            test       rax, rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986623E 0F84EE920700      jz         dword 0x7fff798df532
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866244 448BCB            mov        r9d, ebx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866247 488D442458        lea        rax, [rsp+0x58]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986624C 4C8BC7            mov        r8, rdi
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986624F 4889442438        mov        [rsp+0x38], rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866254 41D1E9            shr        r9d, 1
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866257 4889742430        mov        [rsp+0x30], rsi
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986625C BA00040000        mov        edx, 0x400
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866261 33C9              xor        ecx, ecx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866263 41FFC9            dec        r9d
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866266 895C2428          mov        [rsp+0x28], ebx
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986626A 4C89642420        mov        [rsp+0x20], r12
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986626F FF1503D13A00      call       qword near [rip+0x3ad103]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866275 8945BC            mov        [rbp-0x44], eax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866278 8BC0              mov        eax, eax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986627A 46882C20          mov        [rax+r12], r13b
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986627E 44396C2458        cmp        [rsp+0x58], r13d
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866283 0F8522920700      jnz        dword 0x7fff798df4ab
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866289 BAFFFFFFFF        mov        edx, 0xffffffff
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986628E 4D85F6            test       r14, r14
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866291 7434              jz         0x7fff798662c7
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866293 488D44245C        lea        rax, [rsp+0x5c]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866298 4533C9            xor        r9d, r9d
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986629B 41B8E9FD0000      mov        r8d, 0xfde9
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662A1 4889442428        mov        [rsp+0x28], rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662A6 488D4590          lea        rax, [rbp-0x70]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662AA 498BCE            mov        rcx, r14
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662AD 4889442420        mov        [rsp+0x20], rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662B2 E8D5E0F9FF        call       0x7fff7980438c  ; HttpEndRequestW (wininet.dll)
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662B7 8BF0              mov        esi, eax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662B9 89442468          mov        [rsp+0x68], eax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662BD 85C0              test       eax, eax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662BF 0F858CFD0400      jnz        dword 0x7fff798b6051
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662C5 33F6              xor        esi, esi
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662C7 4D85FF            test       r15, r15
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662CA 0F856F920700      jnz        dword 0x7fff798df53f
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662D0 41BEFFFFFFFF      mov        r14d, 0xffffffff
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662D6 488B85B0000000    mov        rax, [rbp+0xb0]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662DD 4885C0            test       rax, rax
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662E0 0F858C930700      jnz        dword 0x7fff798df672
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662E6 4C8BBDB8000000    mov        r15, [rbp+0xb8]
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662ED 4D85FF            test       r15, r15
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662F0 0F8403010000      jz         dword 0x7fff798663f9
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662F6 0FB7FE            movzx      edi, si
2018.09.16 11:11:23.249 2017.01.01 00:00:00      crash -->  00007FFF798662F9 4D392F            cmp        [r15], r13
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662FC 740C              jz         0x7fff7986630a
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF798662FE 66FFC7            inc        di
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866301 0FB7C7            movzx      eax, di
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866304 4D392CC7          cmp        [r15+rax*8], r13
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF79866308 75F4              jnz        0x7fff798662fe
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00                 00007FFF7986630A 488B0DDF313800    mov        rcx, [rip+0x3831df]
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.249 2017.01.01 00:00:00   00: 0x00007FFF798662F9
2018.09.16 11:11:23.249 2017.01.01 00:00:00   01: 0x000000959D50C561
2018.09.16 11:11:23.249 2017.01.01 00:00:00   02: 0x0000000000CC0010
2018.09.16 11:11:23.249 2017.01.01 00:00:00   03: 0x000000958E540000
2018.09.16 11:11:23.249 2017.01.01 00:00:00   04: 0x000000959E354970
2018.09.16 11:11:23.249 2017.01.01 00:00:00   05: 0x0000009595F2D2C0
2018.09.16 11:11:23.249 2017.01.01 00:00:00   
2018.09.16 11:11:23.250 OnInit critical error

On real data everything works.

#property tester_library "wininet.dll"
#property tester_library "Kernel32.dll"
It seemed to help.
Juer:
It seemed to help

No, it didn't.

#property tester_library "wininet.dll"
#property tester_library "Kernel32.dll"
Dope... Testing works after compilation. When debugging in testing mode it does not work. And then it doesn't work when testing.
Juer:
Dope... Testing works after compilation. When debugging in testing mode it does not work. And then it doesn't work just when testing.

After running in debug mode ex-file remains from this mode. Apparently, only the release version will work.

Thanks anyway for the great library. 
I finally managed to POST data through wininet, so let me also contribute something here:

for access violation,
1. Changing "nill" to NULL does not help
2. Changing "nill" to 0 does not help

what I did is actually changed the following:

--- string nill = "";
+++ string nill = "\0";

and everything will be fine after that. Enjoy :)

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