SSL_read() hang after read http 100 continue headers

[Lin Ma]

Hi,

My program is using OpenSSL function SSL_read() to read http content.
It works fine for most of the headers, but after it receives HTTP/1.1
100 Continue header (the first block of headers), it will hang there. It should continue to read the
headers (which is HTTP/1.1 200 OK...). The following is the header
dumping and the code I used. The http equivalent code works fine. After the first block of headers, it should continually read the 2nd block of headers.

 

Is it because after the first block of header (see the following), the terminators  0d 0a 0d 0a confused SSL_read? or the terminators are the same as SSL block terminator? How can I get around it?

 

This is the first block of headers

HTTP/1.1 100 Continue

Server: Microsoft-IIS/5.0
Date:Wed, 30 Oct 2002 06:34:56 GMT

 

Can you help me?


Thank you.

while (Retries <= 4 )
{
len = strlen(buf);

        printf("before SSL_read(), buf len=%d\n", len);
r=SSL_read(Connect->ssl,buf,100);
err = SSL_get_error(Connect->ssl, r);

printf("r=%d, err=%d\n", r, err);

if (err == SSL_ERROR_NONE)
    bytes = r;

if (err != SSL_ERROR_NONE && err != SSL_ERROR_WANT_READ && err ==
SSL_ERROR_ZERO_RETURN)
{
printf(" SSL_ERROR_ZERO_RETURN\n");
break;
}


if (err != SSL_ERROR_NONE && err != SSL_ERROR_WANT_READ && err ==
SSL_ERROR_SYSCALL)
{
printf(" SSL_ERROR_SYSCALL\n");
break;
}

if (err != SSL_ERROR_NONE && err != SSL_ERROR_WANT_READ && err !=
SSL_ERROR_SYSCALL && err != SSL_ERROR_ZERO_RETURN)
{
printf("Reading header, SSL read problem\n");
break;
}

if (bytes < 0 && Control->AGW==1) {
printf("read returned -1 (Error %d), returning ...\n", errno);
break;
}
else if (bytes == 0)
{
Retries++;
}
else if (bytes > 0)
{
buf[bytes] = '\0';
printf("read %d bytes, buf={%s}\n", bytes, buf);
}

}


0x00000000 | 48 54 54 50 2f 31 2e 31 20 31 30 30 20 43 6f 6e |HTTP/1.1 100 Con
0x00000010 | 74 69 6e 75 65 0d 0a 53 65 72 76 65 72 3a 20 4d |tinue..Server: M
0x00000020 | 69 63 72 6f 73 6f 66 74 2d 49 49 53 2f 35 2e 30 |icrosoft-IIS/5.0
0x00000030 | 0d 0a 44 61 74 65 3a 20 57 65 64 2c 20 33 30 20 | ..Date:Wed, 30
0x00000040 | 4f 63 74 20 32 30 30 32 20 30 36 3a 33 34 3a 35 | Oct 2002 06:34:5
0x00000050 | 36 20 47 4d 54 0d 0a 0d 0a                      | 6 GMT....

0x00000000 | 48 54 54 50 2f 31 2e 31 20 32 30 30 20 4f 4b 0d |HTTP/1.1 200 OK.
0x00000010 | 0a 53 65 72 76 65 72 3a 20 4d 69 63 72 6f 73 6f |.Server: Microso
0x00000020 | 66 74 2d 49 49 53 2f 35 2e 30 0d 0a 44 61 74 65 |ft-IIS/5.0..Date
0x00000030 | 3a 20 57 65 64 2c 20 33 30 20 4f 63 74 20 32 30 | : Wed,30 Oct 20
0x00000040 | 30 32 20 30 36 3a 33 35 3a 30 37 20 47 4d 54 0d | 02 06:35:07 GMT.
0x00000050 | 0a 43 6f 6e 74 65 6e 74 2d 4c 65 6e 67 74 68 3a |.Content-Length:
0x00000060 | 20 31 38 36 33 0d 0a 43 6f 6e 74 65 6e 74 2d 54 |1863..Content-T
0x00000070 | 79 70 65 3a 20 74 65 78 74 2f 68 74 6d 6c 0d 0a | ype:text/html..
0x00000080 | 45 78 70 69 72 65 73 3a 20 57 65 64 2c 20 33 30 |Expires: Wed, 30
0x00000090 | 20 4f 63 74 20 32 30 30 32 20 30 36 3a 33 35 3a |  Oct 2002 06:35:
0x000000a0 | 30 37 20 47 4d 54 0d 0a 43 61 63 68 65 2d 63 6f | 07 GMT..Cache-co
0x000000b0 | 6e 74 72 6f 6c 3a 20 70 72 69 76 61 74 65 0d 0a | ntrol: private..