Question

我得到随机字节，引导每个SSL_read的缓冲区内容

char *getJSON(char *url) {
int sock, length, bytes, https = 0;                         
struct sockaddr_in server;
char *json = NULL, buffer[4096], command[200], *hostname = malloc(100);
size_t size;

char *q = url, *r = malloc(100), *s = hostname;
if(q[4] == 's')
    https = 1;
int k = 0, j = 0, i = https ? 8 : 7;
for(; q[i] != '/'; i++, j++)
    s[j] = q[i];
for(; q[i] != '\0'; i++, k++)   
    r[k] = q[i];
r[k] = '\0';
s[j] = '\0';

struct hostent *host;
if((host = gethostbyname(hostname)) == NULL) {
    printf("gethostbyname() failed\n");
    return NULL;
}

memset(&server, 0, sizeof(server));
server.sin_family = AF_INET;
server.sin_addr = *((struct in_addr *)host->h_addr);
server.sin_port = htons(https ? 443 : 80);
bzero(&(server.sin_zero), 8);

sprintf(command, "GET %s HTTP/1.1\r\nHost: %s\r\n\r\n", r, hostname);

if((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
    perror("socket: ");
    return NULL;
}

struct timeval tv;
tv.tv_sec = 5;
tv.tv_usec = 0;
setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv,sizeof(struct timeval));

if(connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0) {
    perror("connect: ");
    free(hostname);
    free(r);
    return NULL;
}
length = strlen(command);
if(!https) {
    if(send(sock, command, length, 0) != length) {
        printf("send fail\n");
        close(sock);
        free(hostname);
        free(r);
        return NULL;
    }

    size = 0;
    while((bytes = recv(sock, buffer, sizeof(buffer), 0)) > 0) {
        size += bytes;
        json = realloc(json, size + 1);
        memcpy(json + size - bytes, buffer, bytes);
    }
    if(json != NULL)
        json[size] = '\0';

    close(sock);
    free(hostname);
    free(r);
}
else {
    int status;
    SSL_CTX *ctx = NULL;
    SSL *session = NULL;
    SSL_METHOD *method;

    SSL_library_init();
    SSL_load_error_strings();
    OpenSSL_add_all_algorithms();
    method = SSLv3_client_method();
    ctx = SSL_CTX_new(method);
  if(ctx == NULL) {
        printf("ctx: %s\n", ERR_error_string(ERR_get_error(), NULL));
        close(sock);
        free(hostname);
        free(r);
        return NULL;
    }
  session = SSL_new(ctx);
  if(session == NULL) {
        printf("session: %s\n", ERR_error_string(ERR_get_error(), NULL));
        SSL_CTX_free(ctx);
        close(sock);
        free(hostname);
        free(r);
        return NULL;
    }
  if(!SSL_set_fd(session, sock)) {
        printf("set_fd: %s\n", ERR_error_string(ERR_get_error(), NULL));
        SSL_free(session);
        SSL_CTX_free(ctx);
        close(sock);
        free(hostname);
        free(r);
        return NULL;
    }
  if(SSL_connect(session) != 1) {
        printf("ssl_connect: %s\n", ERR_error_string(ERR_get_error(), NULL));
        SSL_free(session);
        SSL_CTX_free(ctx);
        close(sock);
        free(hostname);
        free(r);
        return NULL;
    }

    SSL_write(session, command, length);
    sleep(1);

    size = 0;
    while((bytes = SSL_read(session, buffer, sizeof(buffer))) > 0) {
        json = realloc(json, size + bytes + 1);
        memcpy(json + size, buffer, bytes);
        size += bytes;
    }
    if(json != NULL)
        json[size] = '\0';

    SSL_shutdown(session);
    close(sock);
    free(hostname);
    free(r);

    SSL_free(session);
    SSL_CTX_free(ctx);
}

i = 0;
while(json[i] != '{' && i < size)
    i++;
if(i == size -1)
    json = NULL;
else {
    char *temp = malloc(size - i + 2);
    strncpy(temp, json + i, size - i + 1);
    free(json);
    json = temp;
}

return json;
}

感兴趣区域问题的样本加粗：

＆＃34; UNO / POT＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 1000.00000000＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 1000.00000000＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 1000.00000000＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 4000.00000000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 1.00000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 291.00000000＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 2.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34;＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34;＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0＆＃34; }，＆＃34; USDE / BTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00000040＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00000040＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000040＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00000041＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 100.00000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00000039＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 350000.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.00000058＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00000036＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0.63630518＆＃34; }，＆＃34; USDE / DOGE＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.30000000＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.30000000＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000000＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.40000000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 1000.00000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.20000000＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 600.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.30000000＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00000001＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 150.00004453＆＃34; }，＆＃34; USDE / LTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00001400＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00001400＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00001500＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00006699＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 999.02392380＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00001400＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 6545.30401900＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.00002000＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00001400＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0.13267596＆＃34; }，的＆＃34;û A3B TC / BTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00017500＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00017500＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00020001＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00020001＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 159.31100000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00018000＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 404.44538889＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.00025794＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00015200＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 2.03433487＆＃34; }，＆＃34; UTC / DOGE＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00017500＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00000000＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000000＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 100000.00000000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 7.57259300＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 1.00000011＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 50.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34;＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34;＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0＆＃34; }，＆＃34; UTC / LTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.01600000＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.01580000＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.01600000＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.01490000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 50.11762200＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00001101＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 1283.55681200＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.01600000＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.01600000＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0.04516711＆＃34; }，＆＃34; VDC / BTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00000010＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00000012＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000010＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00000026＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 26918.98003600＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00000005＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 100000.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.00000028＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00000010＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0.02909542＆＃34; }，＆＃34; VDC / LTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00000100＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00000100＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000300＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00000600＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 1249.60000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00000100＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 2181786.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34;＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34;＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0＆＃34; }，＆＃34; VMP / BTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00002610＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00002610＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00003200＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00005000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 66.00000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00002610＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 26.00464672＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.00005000＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00002610＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0.04879532＆＃34; }，＆＃34; VMP / DOGE＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 33.00000000＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 10.00000000＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 33.00000000＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 33.00000000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 300.00000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00000006＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 20000000.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34;＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34;＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0＆＃34; }，＆＃34; VMP / POT＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00548000＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00548000＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000000＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 33.00000000＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 300.00000000＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00549000＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 100.00000000＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34;＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34;＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0＆＃34; }，的＆＃34; VO 5A8 LT / BTC＆＃34; ：{ ＆＃34; last_trade＆＃34;：＆＃34; 0.00000002＆＃34;，＆＃34; last_sell＆＃34;：＆＃34; 0.00000002＆＃34;，＆＃34; last_buy＆＃34;：＆＃34; 0.00000003＆＃34;，＆＃34; current_ask＆＃34;：＆＃34; 0.00000003＆＃34 ;, ＆＃34; current_ask_volume＆＃34;：＆＃34; 115696031.91739591＆＃34 ;, ＆＃34; CURRENT_BID＆＃34;：＆＃34; 0.00000002＆＃34 ;, ＆＃34; current_bid_volume＆＃34;：＆＃34; 200707569.17978617＆＃34 ;, ＆＃34; highest_24h＆＃34;：＆＃34; 0.00000003＆＃34;，＆＃34;最低_24h＆＃34;：＆＃34; 0.00000002＆＃34;，＆＃34; volume_base_24h＆＃34;：＆＃34; 0.97345629＆＃34; }，

Answer 1

这些“随机字节”是HTTP chunked encoding使用的十六进制内容长度指示符。

不属于的随机字节，SSL_read

1 个答案: