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read can return -1, check for this to avoid corrupting protocol

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fixes #470
This commit is contained in:
Ben Hencke
2020-02-15 06:37:07 -08:00
parent c038f100d6
commit 516911900b
1 changed files with 2 additions and 2 deletions
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4
src/WebSockets.cpp
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@ -595,7 +595,7 @@ bool WebSockets::readCb(WSclient_t * client, uint8_t * out, size_t n, WSreadWait
#else
unsigned long t = millis();
size_t len;
ssize_t len;
DEBUG_WEBSOCKETS("[readCb] n: %zu t: %lu\n", n, t);
while(n > 0) {
if(client->tcp == NULL) {
@ -630,7 +630,7 @@ bool WebSockets::readCb(WSclient_t * client, uint8_t * out, size_t n, WSreadWait
}
len = client->tcp->read((uint8_t *)out, n);
if(len) {
if(len > 0) {
t = millis();
out += len;
n -= len;