static void
handle_response(TSHttpTxn txnp)
{
TSMBuffer bufp;
TSMLoc hdr_loc, newfield_loc;
char *errormsg_body = "All requests from this IP address are redirected.\n";
char *tmp_body;
if (TSHttpTxnClientRespGet(txnp, &bufp, &hdr_loc) != TS_SUCCESS) {
TSError("[%s] Couldn't retrieve client response header", PLUGIN_NAME);
goto done;
}
TSHttpHdrStatusSet(bufp, hdr_loc, TS_HTTP_STATUS_MOVED_PERMANENTLY);
TSHttpHdrReasonSet(bufp, hdr_loc, TSHttpHdrReasonLookup(TS_HTTP_STATUS_MOVED_PERMANENTLY),
strlen(TSHttpHdrReasonLookup(TS_HTTP_STATUS_MOVED_PERMANENTLY)));
TSMimeHdrFieldCreate(bufp, hdr_loc, &newfield_loc); /* Probably should check for errors ... */
TSMimeHdrFieldNameSet(bufp, hdr_loc, newfield_loc, TS_MIME_FIELD_LOCATION, TS_MIME_LEN_LOCATION);
TSMimeHdrFieldValueStringInsert(bufp, hdr_loc, newfield_loc, -1, uri_redirect, strlen(uri_redirect));
TSMimeHdrFieldAppend(bufp, hdr_loc, newfield_loc);
/*
* Note that we can't directly use errormsg_body, as TSHttpTxnErrorBodySet()
* will try to free the passed buffer with TSfree().
*/
tmp_body = TSstrdup(errormsg_body);
TSHttpTxnErrorBodySet(txnp, tmp_body, strlen(tmp_body), NULL);
TSHandleMLocRelease(bufp, hdr_loc, newfield_loc);
TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
done:
TSHttpTxnReenable(txnp, TS_EVENT_HTTP_CONTINUE);
}
static int
ts_lua_client_response_set_error_resp(lua_State *L)
{
int n, status;
const char *body;
const char *reason;
int reason_len;
size_t body_len;
int resp_len;
char *resp_buf;
TSMLoc field_loc;
ts_lua_http_ctx *http_ctx;
GET_HTTP_CONTEXT(http_ctx, L);
TS_LUA_CHECK_CLIENT_RESPONSE_HDR(http_ctx);
n = lua_gettop(L);
status = luaL_checkinteger(L, 1);
reason = TSHttpHdrReasonLookup(status);
reason_len = strlen(reason);
TSHttpHdrStatusSet(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, status);
TSHttpHdrReasonSet(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, reason, reason_len);
body_len = 0;
if (n == 2) {
body = luaL_checklstring(L, 2, &body_len);
}
if (body_len && body) {
resp_buf = TSmalloc(body_len);
memcpy(resp_buf, body, body_len);
resp_len = body_len;
} else {
resp_buf = TSmalloc(reason_len);
memcpy(resp_buf, reason, reason_len);
resp_len = reason_len;
}
field_loc = TSMimeHdrFieldFind(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, TS_MIME_FIELD_TRANSFER_ENCODING,
TS_MIME_LEN_TRANSFER_ENCODING);
if (field_loc) {
TSMimeHdrFieldDestroy(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, field_loc);
TSHandleMLocRelease(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, field_loc);
}
TSHttpTxnErrorBodySet(http_ctx->txnp, resp_buf, resp_len, NULL);
return 0;
}
//设置源服务器响应的状态
TSReturnCode StaServerRespStatusSet(TSHttpTxn txnp,TSHttpStatus status)
{
TSMBuffer resp_bufp;
TSMLoc resp_loc;
TSReturnCode ret;
if (TSHttpTxnServerRespGet(txnp, &resp_bufp, &resp_loc) != TS_SUCCESS) {
return TS_ERROR;
}
ret = TSHttpHdrStatusSet(resp_bufp, resp_loc, status);
TSHandleMLocRelease(resp_bufp, TS_NULL_MLOC, resp_loc);
return ret;
}
static void
handle_response(TSHttpTxn txnp, TSCont contp ATS_UNUSED)
{
TSMBuffer bufp;
TSMLoc hdr_loc;
TSMLoc url_loc;
char *url_str;
char *buf;
int url_length;
if (TSHttpTxnClientRespGet(txnp, &bufp, &hdr_loc) != TS_SUCCESS) {
TSError("[%s] Couldn't retrieve client response header", PLUGIN_NAME);
goto done;
}
TSHttpHdrStatusSet(bufp, hdr_loc, TS_HTTP_STATUS_FORBIDDEN);
TSHttpHdrReasonSet(bufp, hdr_loc, TSHttpHdrReasonLookup(TS_HTTP_STATUS_FORBIDDEN),
strlen(TSHttpHdrReasonLookup(TS_HTTP_STATUS_FORBIDDEN)));
if (TSHttpTxnClientReqGet(txnp, &bufp, &hdr_loc) != TS_SUCCESS) {
TSError("[%s] Couldn't retrieve client request header", PLUGIN_NAME);
TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
goto done;
}
if (TSHttpHdrUrlGet(bufp, hdr_loc, &url_loc) != TS_SUCCESS) {
TSError("[%s] Couldn't retrieve request url", PLUGIN_NAME);
TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
goto done;
}
buf = (char *)TSmalloc(4096);
url_str = TSUrlStringGet(bufp, url_loc, &url_length);
sprintf(buf, "You are forbidden from accessing \"%s\"\n", url_str);
TSfree(url_str);
TSHandleMLocRelease(bufp, hdr_loc, url_loc);
TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
TSHttpTxnErrorBodySet(txnp, buf, strlen(buf), NULL);
done:
TSHttpTxnReenable(txnp, TS_EVENT_HTTP_CONTINUE);
}
static int
ts_lua_server_response_set_status(lua_State * L)
{
int status;
const char *reason;
int reason_len;
ts_lua_http_ctx *http_ctx;
http_ctx = ts_lua_get_http_ctx(L);
TS_LUA_CHECK_SERVER_RESPONSE_HDR(http_ctx);
status = luaL_checkint(L, 1);
reason = TSHttpHdrReasonLookup(status);
reason_len = strlen(reason);
TSHttpHdrStatusSet(http_ctx->server_response_bufp, http_ctx->server_response_hdrp, status);
TSHttpHdrReasonSet(http_ctx->server_response_bufp, http_ctx->server_response_hdrp, reason, reason_len);
return 0;
}
static int
ts_lua_client_response_set_status(lua_State *L)
{
int status;
const char *reason;
int reason_len;
ts_lua_http_ctx *http_ctx;
GET_HTTP_CONTEXT(http_ctx, L);
TS_LUA_CHECK_CLIENT_RESPONSE_HDR(http_ctx);
status = luaL_checkint(L, 1);
reason = TSHttpHdrReasonLookup(status);
reason_len = strlen(reason);
TSHttpHdrStatusSet(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, status);
TSHttpHdrReasonSet(http_ctx->client_response_bufp, http_ctx->client_response_hdrp, reason, reason_len);
return 0;
}
/* Before we can send the response, we want to modify it to a "200 OK" again,
and produce some reasonable body output. */
static int
on_send_response_header(TSHttpTxn txnp, TSCont contp, PurgeInstance *purge)
{
TSMBuffer bufp;
TSMLoc hdr_loc;
TSDebug(PLUGIN_NAME, "Fixing up the response on the successful PURGE");
if (TS_SUCCESS == TSHttpTxnClientRespGet(txnp, &bufp, &hdr_loc)) {
char response[1024];
int len = snprintf(response, sizeof(response), "PURGED %s\r\n\r\n", purge->id);
TSHttpHdrStatusSet(bufp, hdr_loc, TS_HTTP_STATUS_OK);
TSHttpHdrReasonSet(bufp, hdr_loc, "OK", 2);
TSHttpTxnErrorBodySet(txnp, TSstrdup(response), len >= sizeof(response) ? sizeof(response) - 1 : len, NULL);
TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
TSHttpTxnReenable(txnp, TS_EVENT_HTTP_CONTINUE);
} else {
TSHttpTxnReenable(txnp, TS_EVENT_HTTP_ERROR);
}
return TS_SUCCESS;
}
/**
* Handler function to generate an error response
*/
static void error_response(TSHttpTxn txnp, tsib_txn_ctx *txndata)
{
const char *reason;
TSMBuffer bufp;
TSMLoc hdr_loc;
TSMLoc field_loc;
hdr_list *hdrs;
TSReturnCode rv;
/* make caller responsible for sanity checking */
assert((txndata != NULL) && (txndata->tx != NULL));
reason = TSHttpHdrReasonLookup(txndata->status);
if (TSHttpTxnClientRespGet(txnp, &bufp, &hdr_loc) != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: couldn't retrieve client response header.");
TSHttpTxnReenable(txnp, TS_EVENT_HTTP_CONTINUE);
return;
}
rv = TSHttpHdrStatusSet(bufp, hdr_loc, txndata->status);
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSHttpHdrStatusSet");
}
if (reason == NULL) {
reason = "Other";
}
rv = TSHttpHdrReasonSet(bufp, hdr_loc, reason, strlen(reason));
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSHttpHdrReasonSet");
}
while (hdrs = txndata->err_hdrs, hdrs != 0) {
txndata->err_hdrs = hdrs->next;
rv = TSMimeHdrFieldCreate(bufp, hdr_loc, &field_loc);
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSMimeHdrFieldCreate");
continue;
}
rv = TSMimeHdrFieldNameSet(bufp, hdr_loc, field_loc,
hdrs->hdr, strlen(hdrs->hdr));
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSMimeHdrFieldNameSet");
goto errordoc_free1;
}
rv = TSMimeHdrFieldValueStringInsert(bufp, hdr_loc, field_loc, -1,
hdrs->value, strlen(hdrs->value));
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSMimeHdrFieldValueStringInsert");
goto errordoc_free1;
}
rv = TSMimeHdrFieldAppend(bufp, hdr_loc, field_loc);
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSMimeHdrFieldAppend");
goto errordoc_free1;
}
errordoc_free1:
rv = TSHandleMLocRelease(bufp, hdr_loc, field_loc);
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSHandleMLocRelease 1");
continue;
}
}
if (txndata->err_body) {
/* this will free the body, so copy it first! */
TSHttpTxnErrorBodySet(txnp, txndata->err_body,
txndata->err_body_len, NULL);
}
rv = TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
if (rv != TS_SUCCESS) {
ib_log_error_tx(txndata->tx,
"ErrorDoc: TSHandleMLocRelease 2");
}
ib_log_debug_tx(txndata->tx,
"Sent error page %d \"%s\".", txndata->status, reason);
}
/**
* Handler function to generate an internal error response
* when ironbee is unavailable to fill the fields or log errors.
*
* This may come from a TXN_START event, in which case we're
* returning an HTTP/0.9 response and most of this is superfluous.
*/
static void internal_error_response(TSHttpTxn txnp)
{
TSReturnCode rv;
const char *reason = "Server Unavailable";
TSMBuffer bufp;
TSMLoc hdr_loc;
TSMLoc field_loc;
char *body;
char clen[8];
int i;
const struct {
const char *name;
const char *val;
} headers[2] = {
{ "Content-Type", "text/plain" },
{ "Content-Length", clen }
};
if (TSHttpTxnClientRespGet(txnp, &bufp, &hdr_loc) != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: couldn't retrieve client response header.");
return;
}
rv = TSHttpHdrStatusSet(bufp, hdr_loc, 503);
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSHttpHdrStatusSet");
}
rv = TSHttpHdrReasonSet(bufp, hdr_loc, reason, strlen(reason));
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSHttpHdrReasonSet");
}
/* this will free the body, so copy it first! */
body = TSstrdup("Server unavailable or disabled.\n");
snprintf(clen, sizeof(clen), "%zd", strlen(body));
for (i = 0; i < 2; ++i) {
rv = TSMimeHdrFieldCreate(bufp, hdr_loc, &field_loc);
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSMimeHdrFieldCreate");
continue;
}
rv = TSMimeHdrFieldNameSet(bufp, hdr_loc, field_loc,
headers[i].name, strlen(headers[i].name));
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSMimeHdrFieldNameSet");
goto freehdr;
}
rv = TSMimeHdrFieldValueStringInsert(bufp, hdr_loc, field_loc, -1,
headers[i].val, strlen(headers[i].val));
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSMimeHdrFieldValueStringInsert");
goto freehdr;
}
rv = TSMimeHdrFieldAppend(bufp, hdr_loc, field_loc);
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSMimeHdrFieldAppend");
goto freehdr;
}
freehdr:
rv = TSHandleMLocRelease(bufp, hdr_loc, field_loc);
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSHandleMLocRelease 3");
continue;
}
}
TSHttpTxnErrorBodySet(txnp, body, strlen(body), NULL);
rv = TSHandleMLocRelease(bufp, TS_NULL_MLOC, hdr_loc);
if (rv != TS_SUCCESS) {
TSError("[ironbee] ErrorDoc: TSHandleMLocRelease 4");
}
}