src/da.c - haproxy - Gitiles

 #include <stdio.h>

 #include <haproxy/api.h>
 #include <common/cfgparse.h>
 #include <haproxy/errors.h>
 #include <haproxy/http.h>
 #include <types/global.h>
 #include <proto/arg.h>
 #include <proto/http_fetch.h>
 #include <proto/http_htx.h>
 #include <proto/log.h>
 #include <proto/http_ana.h>
 #include <proto/sample.h>
 #include <dac.h>

 static struct {
 	void *atlasimgptr;
 	char *jsonpath;
 	char *cookiename;
 	size_t cookienamelen;
 	da_atlas_t atlas;
 	da_evidence_id_t useragentid;
 	da_severity_t loglevel;
 	char separator;
 	unsigned char daset:1;
 } global_deviceatlas = {
 	.loglevel = 0,
 	.jsonpath = 0,
 	.cookiename = 0,
 	.cookienamelen = 0,
 	.useragentid = 0,
 	.daset = 0,
 	.separator = '|',
 };

 static int da_json_file(char **args, int section_type, struct proxy *curpx,
                         struct proxy *defpx, const char *file, int line,
                         char **err)
 {
 	if (*(args[1]) == 0) {
 		memprintf(err, "deviceatlas json file : expects a json path.\n");
 		return -1;
 	}
 	global_deviceatlas.jsonpath = strdup(args[1]);
 	return 0;
 }

 static int da_log_level(char **args, int section_type, struct proxy *curpx,
                         struct proxy *defpx, const char *file, int line,
                         char **err)
 {
 	int loglevel;
 	if (*(args[1]) == 0) {
 		memprintf(err, "deviceatlas log level : expects an integer argument.\n");
 		return -1;
 	}

 	loglevel = atol(args[1]);
 	if (loglevel < 0 || loglevel > 3) {
 		memprintf(err, "deviceatlas log level : expects a log level between 0 and 3, %s given.\n", args[1]);
 	} else {
 		global_deviceatlas.loglevel = (da_severity_t)loglevel;
 	}

 	return 0;
 }

 static int da_property_separator(char **args, int section_type, struct proxy *curpx,
                                  struct proxy *defpx, const char *file, int line,
                                  char **err)
 {
 	if (*(args[1]) == 0) {
 		memprintf(err, "deviceatlas property separator : expects a character argument.\n");
 		return -1;
 	}
 	global_deviceatlas.separator = *args[1];
 	return 0;
 }

 static int da_properties_cookie(char **args, int section_type, struct proxy *curpx,
                           struct proxy *defpx, const char *file, int line,
                           char **err)
 {
 	if (*(args[1]) == 0) {
 		memprintf(err, "deviceatlas cookie name : expects a string argument.\n");
 		return -1;
 	} else {
 		global_deviceatlas.cookiename = strdup(args[1]);
 	}
 	global_deviceatlas.cookienamelen = strlen(global_deviceatlas.cookiename);
 	return 0;
 }

 static size_t da_haproxy_read(void *ctx, size_t len, char *buf)
 {
 	return fread(buf, 1, len, ctx);
 }

 static da_status_t da_haproxy_seek(void *ctx, off_t off)
 {
 	return fseek(ctx, off, SEEK_SET) != -1 ? DA_OK : DA_SYS;
 }

 static void da_haproxy_log(da_severity_t severity, da_status_t status,
 	const char *fmt, va_list args)
 {
 	if (global_deviceatlas.loglevel && severity <= global_deviceatlas.loglevel) {
 		char logbuf[256];
 		vsnprintf(logbuf, sizeof(logbuf), fmt, args);
 		ha_warning("deviceatlas : %s.\n", logbuf);
 	}
 }

 #define	DA_COOKIENAME_DEFAULT		"DAPROPS"

 /*
  * module init / deinit functions. Returns 0 if OK, or a combination of ERR_*.
  */
 static int init_deviceatlas(void)
 {
 	int err_code = 0;

 	if (global_deviceatlas.jsonpath != 0) {
 		FILE *jsonp;
 		da_property_decl_t extraprops[] = {{0, 0}};
 		size_t atlasimglen;
 		da_status_t status;

 		jsonp = fopen(global_deviceatlas.jsonpath, "r");
 		if (jsonp == 0) {
 			ha_alert("deviceatlas : '%s' json file has invalid path or is not readable.\n",
 				 global_deviceatlas.jsonpath);
 			err_code |= ERR_ALERT | ERR_FATAL;
 			goto out;
 		}

 		da_init();
 		da_seterrorfunc(da_haproxy_log);
 		status = da_atlas_compile(jsonp, da_haproxy_read, da_haproxy_seek,
 			&global_deviceatlas.atlasimgptr, &atlasimglen);
 		fclose(jsonp);
 		if (status != DA_OK) {
 			ha_alert("deviceatlas : '%s' json file is invalid.\n",
 				 global_deviceatlas.jsonpath);
 			err_code |= ERR_ALERT | ERR_FATAL;
 			goto out;
 		}

 		status = da_atlas_open(&global_deviceatlas.atlas, extraprops,
 			global_deviceatlas.atlasimgptr, atlasimglen);

 		if (status != DA_OK) {
 			ha_alert("deviceatlas : data could not be compiled.\n");
 			err_code |= ERR_ALERT | ERR_FATAL;
 			goto out;
 		}

 		if (global_deviceatlas.cookiename == 0) {
 			global_deviceatlas.cookiename = strdup(DA_COOKIENAME_DEFAULT);
 			global_deviceatlas.cookienamelen = strlen(global_deviceatlas.cookiename);
 		}

 		global_deviceatlas.useragentid = da_atlas_header_evidence_id(&global_deviceatlas.atlas,
 			"user-agent");
 		global_deviceatlas.daset = 1;

 		fprintf(stdout, "Deviceatlas module loaded.\n");
 	}

 out:
 	return err_code;
 }

 static void deinit_deviceatlas(void)
 {
 	if (global_deviceatlas.jsonpath != 0) {
 		free(global_deviceatlas.jsonpath);
 	}

 	if (global_deviceatlas.daset == 1) {
 		free(global_deviceatlas.cookiename);
 		da_atlas_close(&global_deviceatlas.atlas);
 		free(global_deviceatlas.atlasimgptr);
 	}

 	da_fini();
 }

 static int da_haproxy(const struct arg *args, struct sample *smp, da_deviceinfo_t *devinfo)
 {
 	struct buffer *tmp;
 	da_propid_t prop, *pprop;
 	da_status_t status;
 	da_type_t proptype;
 	const char *propname;
 	int i;

 	tmp = get_trash_chunk();
 	chunk_reset(tmp);

 	propname = (const char *) args[0].data.str.area;
 	i = 0;

 	for (; propname != 0; i ++,
 	     propname = (const char *) args[i].data.str.area) {
 		status = da_atlas_getpropid(&global_deviceatlas.atlas,
 			propname, &prop);
 		if (status != DA_OK) {
 			chunk_appendf(tmp, "%c", global_deviceatlas.separator);
 			continue;
 		}
 		pprop = &prop;
 		da_atlas_getproptype(&global_deviceatlas.atlas, *pprop, &proptype);

 		switch (proptype) {
 			case DA_TYPE_BOOLEAN: {
 				bool val;
 				status = da_getpropboolean(devinfo, *pprop, &val);
 				if (status == DA_OK) {
 					chunk_appendf(tmp, "%d", val);
 				}
 				break;
 			}
 			case DA_TYPE_INTEGER:
 			case DA_TYPE_NUMBER: {
 				long val;
 				status = da_getpropinteger(devinfo, *pprop, &val);
 				if (status == DA_OK) {
 					chunk_appendf(tmp, "%ld", val);
 				}
 				break;
 			}
 			case DA_TYPE_STRING: {
 				const char *val;
 				status = da_getpropstring(devinfo, *pprop, &val);
 				if (status == DA_OK) {
 					chunk_appendf(tmp, "%s", val);
 				}
 				break;
 		        }
 		    default:
 			break;
 		}

 		chunk_appendf(tmp, "%c", global_deviceatlas.separator);
 	}

 	da_close(devinfo);

 	if (tmp->data) {
 		--tmp->data;
 		tmp->area[tmp->data] = 0;
 	}

 	smp->data.u.str.area = tmp->area;
 	smp->data.u.str.data = tmp->data;
 	smp->data.type = SMP_T_STR;

 	return 1;
 }

 static int da_haproxy_conv(const struct arg *args, struct sample *smp, void *private)
 {
 	da_deviceinfo_t devinfo;
 	da_status_t status;
 	const char *useragent;
 	char useragentbuf[1024] = { 0 };
 	int i;

 	if (global_deviceatlas.daset == 0 || smp->data.u.str.data == 0) {
 		return 1;
 	}

 	i = smp->data.u.str.data > sizeof(useragentbuf) ? sizeof(useragentbuf) : smp->data.u.str.data;
 	memcpy(useragentbuf, smp->data.u.str.area, i - 1);
 	useragentbuf[i - 1] = 0;

 	useragent = (const char *)useragentbuf;

 	status = da_search(&global_deviceatlas.atlas, &devinfo,
 		global_deviceatlas.useragentid, useragent, 0);

 	return status != DA_OK ? 0 : da_haproxy(args, smp, &devinfo);
 }

 #define DA_MAX_HEADERS       24

 static int da_haproxy_fetch(const struct arg *args, struct sample *smp, const char *kw, void *private)
 {
 	da_evidence_t ev[DA_MAX_HEADERS];
 	da_deviceinfo_t devinfo;
 	da_status_t status;
 	struct channel *chn;
 	struct htx *htx;
 	struct htx_blk *blk;
 	char vbuf[DA_MAX_HEADERS][1024] = {{ 0 }};
 	int i, nbh = 0;

 	if (global_deviceatlas.daset == 0) {
 		return 0;
 	}

 	chn = (smp->strm ? &smp->strm->req : NULL);
 	htx = smp_prefetch_htx(smp, chn, NULL, 1);
 	if (!htx)
 		return 0;

 	i = 0;
 	for (blk = htx_get_first_blk(htx); nbh < DA_MAX_HEADERS && blk; blk = htx_get_next_blk(htx, blk)) {
 		size_t vlen;
 		char *pval;
 		da_evidence_id_t evid;
 		enum htx_blk_type type;
 		struct ist n, v;
 		char hbuf[24] = { 0 };
 		char tval[1024] = { 0 };

 		type = htx_get_blk_type(blk);

 		if (type == HTX_BLK_HDR) {
 			n = htx_get_blk_name(htx, blk);
 			v = htx_get_blk_value(htx, blk);
 		} else if (type == HTX_BLK_EOH) {
 			break;
 		} else {
 			continue;
 		}

 		/* The HTTP headers used by the DeviceAtlas API are not longer */
 		if (n.len >= sizeof(hbuf)) {
 			continue;
 		}

 		memcpy(hbuf, n.ptr, n.len);
 		hbuf[n.len] = 0;
 		pval = v.ptr;
 		vlen = v.len;
 		evid = -1;
 		i = v.len > sizeof(tval) - 1 ? sizeof(tval) - 1 : v.len;
 		memcpy(tval, v.ptr, i);
 		tval[i] = 0;
 		pval = tval;

 		if (strcasecmp(hbuf, "Accept-Language") == 0) {
 			evid = da_atlas_accept_language_evidence_id(&global_deviceatlas.atlas);
 		} else if (strcasecmp(hbuf, "Cookie") == 0) {
 			char *p, *eval;
 			size_t pl;

 			eval = pval + vlen;
 			/**
 			 * The cookie value, if it exists, is located between the current header's
 			 * value position and the next one
 			 */
 			if (http_extract_cookie_value(pval, eval, global_deviceatlas.cookiename,
 						      global_deviceatlas.cookienamelen, 1, &p, &pl) == NULL) {
 				continue;
 			}

 			vlen -= global_deviceatlas.cookienamelen - 1;
 			pval = p;
 			evid = da_atlas_clientprop_evidence_id(&global_deviceatlas.atlas);
 		} else {
 			evid = da_atlas_header_evidence_id(&global_deviceatlas.atlas, hbuf);
 		}

 		if (evid == -1) {
 			continue;
 		}

 		i = vlen > sizeof(vbuf[nbh]) - 1 ? sizeof(vbuf[nbh]) - 1 : vlen;
 		memcpy(vbuf[nbh], pval, i);
 		vbuf[nbh][i] = 0;
 		ev[nbh].key = evid;
 		ev[nbh].value = vbuf[nbh];
 		++ nbh;
 	}

 	status = da_searchv(&global_deviceatlas.atlas, &devinfo,
 			ev, nbh);

 	return status != DA_OK ? 0 : da_haproxy(args, smp, &devinfo);
 }

 static struct cfg_kw_list dacfg_kws = {{ }, {
 	{ CFG_GLOBAL, "deviceatlas-json-file",	  da_json_file },
 		{ CFG_GLOBAL, "deviceatlas-log-level",	  da_log_level },
 		{ CFG_GLOBAL, "deviceatlas-property-separator", da_property_separator },
 		{ CFG_GLOBAL, "deviceatlas-properties-cookie", da_properties_cookie },
 		{ 0, NULL, NULL },
 }};

 INITCALL1(STG_REGISTER, cfg_register_keywords, &dacfg_kws);

 /* Note: must not be declared <const> as its list will be overwritten */
 static struct sample_fetch_kw_list fetch_kws = {ILH, {
 	{ "da-csv-fetch", da_haproxy_fetch, ARG12(1,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR), NULL, SMP_T_STR, SMP_USE_HRQHV },
 		{ NULL, NULL, 0, 0, 0 },
 }};

 INITCALL1(STG_REGISTER, sample_register_fetches, &fetch_kws);

 /* Note: must not be declared <const> as its list will be overwritten */
 static struct sample_conv_kw_list conv_kws = {ILH, {
 	{ "da-csv-conv", da_haproxy_conv, ARG12(1,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR), NULL, SMP_T_STR, SMP_T_STR },
 		{ NULL, NULL, 0, 0, 0 },
 }};

 static void da_haproxy_register_build_options()
 {
 	char *ptr = NULL;

 #ifdef MOBI_DA_DUMMY_LIBRARY
 	memprintf(&ptr, "Built with DeviceAtlas support (dummy library only).");
 #else
 	memprintf(&ptr, "Built with DeviceAtlas support (library version %u.%u).", MOBI_DA_MAJOR, MOBI_DA_MINOR);
 #endif
 	hap_register_build_opts(ptr, 1);
 }

 INITCALL1(STG_REGISTER, sample_register_convs, &conv_kws);

 REGISTER_POST_CHECK(init_deviceatlas);
 REGISTER_POST_DEINIT(deinit_deviceatlas);
 INITCALL0(STG_REGISTER, da_haproxy_register_build_options);
	#include <stdio.h>

	#include <haproxy/api.h>
	#include <common/cfgparse.h>
	#include <haproxy/errors.h>
	#include <haproxy/http.h>
	#include <types/global.h>
	#include <proto/arg.h>
	#include <proto/http_fetch.h>
	#include <proto/http_htx.h>
	#include <proto/log.h>
	#include <proto/http_ana.h>
	#include <proto/sample.h>
	#include <dac.h>

	static struct {
	void *atlasimgptr;
	char *jsonpath;
	char *cookiename;
	size_t cookienamelen;
	da_atlas_t atlas;
	da_evidence_id_t useragentid;
	da_severity_t loglevel;
	char separator;
	unsigned char daset:1;
	} global_deviceatlas = {
	.loglevel = 0,
	.jsonpath = 0,
	.cookiename = 0,
	.cookienamelen = 0,
	.useragentid = 0,
	.daset = 0,
	.separator = '\|',
	};

	static int da_json_file(char *args, int section_type, struct proxy curpx,
	struct proxy defpx, const char file, int line,
	char **err)
	{
	if (*(args[1]) == 0) {
	memprintf(err, "deviceatlas json file : expects a json path.\n");
	return -1;
	}
	global_deviceatlas.jsonpath = strdup(args[1]);
	return 0;
	}

	static int da_log_level(char *args, int section_type, struct proxy curpx,
	struct proxy defpx, const char file, int line,
	char **err)
	{
	int loglevel;
	if (*(args[1]) == 0) {
	memprintf(err, "deviceatlas log level : expects an integer argument.\n");
	return -1;
	}

	loglevel = atol(args[1]);
	if (loglevel < 0 \|\| loglevel > 3) {
	memprintf(err, "deviceatlas log level : expects a log level between 0 and 3, %s given.\n", args[1]);
	} else {
	global_deviceatlas.loglevel = (da_severity_t)loglevel;
	}

	return 0;
	}

	static int da_property_separator(char *args, int section_type, struct proxy curpx,
	struct proxy defpx, const char file, int line,
	char **err)
	{
	if (*(args[1]) == 0) {
	memprintf(err, "deviceatlas property separator : expects a character argument.\n");
	return -1;
	}
	global_deviceatlas.separator = *args[1];
	return 0;
	}

	static int da_properties_cookie(char *args, int section_type, struct proxy curpx,
	struct proxy defpx, const char file, int line,
	char **err)
	{
	if (*(args[1]) == 0) {
	memprintf(err, "deviceatlas cookie name : expects a string argument.\n");
	return -1;
	} else {
	global_deviceatlas.cookiename = strdup(args[1]);
	}
	global_deviceatlas.cookienamelen = strlen(global_deviceatlas.cookiename);
	return 0;
	}

	static size_t da_haproxy_read(void ctx, size_t len, char buf)
	{
	return fread(buf, 1, len, ctx);
	}

	static da_status_t da_haproxy_seek(void *ctx, off_t off)
	{
	return fseek(ctx, off, SEEK_SET) != -1 ? DA_OK : DA_SYS;
	}

	static void da_haproxy_log(da_severity_t severity, da_status_t status,
	const char *fmt, va_list args)
	{
	if (global_deviceatlas.loglevel && severity <= global_deviceatlas.loglevel) {
	char logbuf[256];
	vsnprintf(logbuf, sizeof(logbuf), fmt, args);
	ha_warning("deviceatlas : %s.\n", logbuf);
	}
	}

	#define DA_COOKIENAME_DEFAULT "DAPROPS"

	/*
	* module init / deinit functions. Returns 0 if OK, or a combination of ERR_*.
	*/
	static int init_deviceatlas(void)
	{
	int err_code = 0;

	if (global_deviceatlas.jsonpath != 0) {
	FILE *jsonp;
	da_property_decl_t extraprops[] = {{0, 0}};
	size_t atlasimglen;
	da_status_t status;

	jsonp = fopen(global_deviceatlas.jsonpath, "r");
	if (jsonp == 0) {
	ha_alert("deviceatlas : '%s' json file has invalid path or is not readable.\n",
	global_deviceatlas.jsonpath);
	err_code \|= ERR_ALERT \| ERR_FATAL;
	goto out;
	}

	da_init();
	da_seterrorfunc(da_haproxy_log);
	status = da_atlas_compile(jsonp, da_haproxy_read, da_haproxy_seek,
	&global_deviceatlas.atlasimgptr, &atlasimglen);
	fclose(jsonp);
	if (status != DA_OK) {
	ha_alert("deviceatlas : '%s' json file is invalid.\n",
	global_deviceatlas.jsonpath);
	err_code \|= ERR_ALERT \| ERR_FATAL;
	goto out;
	}

	status = da_atlas_open(&global_deviceatlas.atlas, extraprops,
	global_deviceatlas.atlasimgptr, atlasimglen);

	if (status != DA_OK) {
	ha_alert("deviceatlas : data could not be compiled.\n");
	err_code \|= ERR_ALERT \| ERR_FATAL;
	goto out;
	}

	if (global_deviceatlas.cookiename == 0) {
	global_deviceatlas.cookiename = strdup(DA_COOKIENAME_DEFAULT);
	global_deviceatlas.cookienamelen = strlen(global_deviceatlas.cookiename);
	}

	global_deviceatlas.useragentid = da_atlas_header_evidence_id(&global_deviceatlas.atlas,
	"user-agent");
	global_deviceatlas.daset = 1;

	fprintf(stdout, "Deviceatlas module loaded.\n");
	}

	out:
	return err_code;
	}

	static void deinit_deviceatlas(void)
	{
	if (global_deviceatlas.jsonpath != 0) {
	free(global_deviceatlas.jsonpath);
	}

	if (global_deviceatlas.daset == 1) {
	free(global_deviceatlas.cookiename);
	da_atlas_close(&global_deviceatlas.atlas);
	free(global_deviceatlas.atlasimgptr);
	}

	da_fini();
	}

	static int da_haproxy(const struct arg args, struct sample smp, da_deviceinfo_t *devinfo)
	{
	struct buffer *tmp;
	da_propid_t prop, *pprop;
	da_status_t status;
	da_type_t proptype;
	const char *propname;
	int i;

	tmp = get_trash_chunk();
	chunk_reset(tmp);

	propname = (const char *) args[0].data.str.area;
	i = 0;

	for (; propname != 0; i ++,
	propname = (const char *) args[i].data.str.area) {
	status = da_atlas_getpropid(&global_deviceatlas.atlas,
	propname, &prop);
	if (status != DA_OK) {
	chunk_appendf(tmp, "%c", global_deviceatlas.separator);
	continue;
	}
	pprop = &prop;
	da_atlas_getproptype(&global_deviceatlas.atlas, *pprop, &proptype);

	switch (proptype) {
	case DA_TYPE_BOOLEAN: {
	bool val;
	status = da_getpropboolean(devinfo, *pprop, &val);
	if (status == DA_OK) {
	chunk_appendf(tmp, "%d", val);
	}
	break;
	}
	case DA_TYPE_INTEGER:
	case DA_TYPE_NUMBER: {
	long val;
	status = da_getpropinteger(devinfo, *pprop, &val);
	if (status == DA_OK) {
	chunk_appendf(tmp, "%ld", val);
	}
	break;
	}
	case DA_TYPE_STRING: {
	const char *val;
	status = da_getpropstring(devinfo, *pprop, &val);
	if (status == DA_OK) {
	chunk_appendf(tmp, "%s", val);
	}
	break;
	}
	default:
	break;
	}

	chunk_appendf(tmp, "%c", global_deviceatlas.separator);
	}

	da_close(devinfo);

	if (tmp->data) {
	--tmp->data;
	tmp->area[tmp->data] = 0;
	}

	smp->data.u.str.area = tmp->area;
	smp->data.u.str.data = tmp->data;
	smp->data.type = SMP_T_STR;

	return 1;
	}

	static int da_haproxy_conv(const struct arg args, struct sample smp, void *private)
	{
	da_deviceinfo_t devinfo;
	da_status_t status;
	const char *useragent;
	char useragentbuf[1024] = { 0 };
	int i;

	if (global_deviceatlas.daset == 0 \|\| smp->data.u.str.data == 0) {
	return 1;
	}

	i = smp->data.u.str.data > sizeof(useragentbuf) ? sizeof(useragentbuf) : smp->data.u.str.data;
	memcpy(useragentbuf, smp->data.u.str.area, i - 1);
	useragentbuf[i - 1] = 0;

	useragent = (const char *)useragentbuf;

	status = da_search(&global_deviceatlas.atlas, &devinfo,
	global_deviceatlas.useragentid, useragent, 0);

	return status != DA_OK ? 0 : da_haproxy(args, smp, &devinfo);
	}

	#define DA_MAX_HEADERS 24

	static int da_haproxy_fetch(const struct arg args, struct sample smp, const char kw, void private)
	{
	da_evidence_t ev[DA_MAX_HEADERS];
	da_deviceinfo_t devinfo;
	da_status_t status;
	struct channel *chn;
	struct htx *htx;
	struct htx_blk *blk;
	char vbuf[DA_MAX_HEADERS][1024] = {{ 0 }};
	int i, nbh = 0;

	if (global_deviceatlas.daset == 0) {
	return 0;
	}

	chn = (smp->strm ? &smp->strm->req : NULL);
	htx = smp_prefetch_htx(smp, chn, NULL, 1);
	if (!htx)
	return 0;

	i = 0;
	for (blk = htx_get_first_blk(htx); nbh < DA_MAX_HEADERS && blk; blk = htx_get_next_blk(htx, blk)) {
	size_t vlen;
	char *pval;
	da_evidence_id_t evid;
	enum htx_blk_type type;
	struct ist n, v;
	char hbuf[24] = { 0 };
	char tval[1024] = { 0 };

	type = htx_get_blk_type(blk);

	if (type == HTX_BLK_HDR) {
	n = htx_get_blk_name(htx, blk);
	v = htx_get_blk_value(htx, blk);
	} else if (type == HTX_BLK_EOH) {
	break;
	} else {
	continue;
	}

	/* The HTTP headers used by the DeviceAtlas API are not longer */
	if (n.len >= sizeof(hbuf)) {
	continue;
	}

	memcpy(hbuf, n.ptr, n.len);
	hbuf[n.len] = 0;
	pval = v.ptr;
	vlen = v.len;
	evid = -1;
	i = v.len > sizeof(tval) - 1 ? sizeof(tval) - 1 : v.len;
	memcpy(tval, v.ptr, i);
	tval[i] = 0;
	pval = tval;

	if (strcasecmp(hbuf, "Accept-Language") == 0) {
	evid = da_atlas_accept_language_evidence_id(&global_deviceatlas.atlas);
	} else if (strcasecmp(hbuf, "Cookie") == 0) {
	char p, eval;
	size_t pl;

	eval = pval + vlen;
	/**
	* The cookie value, if it exists, is located between the current header's
	* value position and the next one
	*/
	if (http_extract_cookie_value(pval, eval, global_deviceatlas.cookiename,
	global_deviceatlas.cookienamelen, 1, &p, &pl) == NULL) {
	continue;
	}

	vlen -= global_deviceatlas.cookienamelen - 1;
	pval = p;
	evid = da_atlas_clientprop_evidence_id(&global_deviceatlas.atlas);
	} else {
	evid = da_atlas_header_evidence_id(&global_deviceatlas.atlas, hbuf);
	}

	if (evid == -1) {
	continue;
	}

	i = vlen > sizeof(vbuf[nbh]) - 1 ? sizeof(vbuf[nbh]) - 1 : vlen;
	memcpy(vbuf[nbh], pval, i);
	vbuf[nbh][i] = 0;
	ev[nbh].key = evid;
	ev[nbh].value = vbuf[nbh];
	++ nbh;
	}

	status = da_searchv(&global_deviceatlas.atlas, &devinfo,
	ev, nbh);

	return status != DA_OK ? 0 : da_haproxy(args, smp, &devinfo);
	}

	static struct cfg_kw_list dacfg_kws = {{ }, {
	{ CFG_GLOBAL, "deviceatlas-json-file", da_json_file },
	{ CFG_GLOBAL, "deviceatlas-log-level", da_log_level },
	{ CFG_GLOBAL, "deviceatlas-property-separator", da_property_separator },
	{ CFG_GLOBAL, "deviceatlas-properties-cookie", da_properties_cookie },
	{ 0, NULL, NULL },
	}};

	INITCALL1(STG_REGISTER, cfg_register_keywords, &dacfg_kws);

	/* Note: must not be declared <const> as its list will be overwritten */
	static struct sample_fetch_kw_list fetch_kws = {ILH, {
	{ "da-csv-fetch", da_haproxy_fetch, ARG12(1,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR), NULL, SMP_T_STR, SMP_USE_HRQHV },
	{ NULL, NULL, 0, 0, 0 },
	}};

	INITCALL1(STG_REGISTER, sample_register_fetches, &fetch_kws);

	/* Note: must not be declared <const> as its list will be overwritten */
	static struct sample_conv_kw_list conv_kws = {ILH, {
	{ "da-csv-conv", da_haproxy_conv, ARG12(1,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR,STR), NULL, SMP_T_STR, SMP_T_STR },
	{ NULL, NULL, 0, 0, 0 },
	}};

	static void da_haproxy_register_build_options()
	{
	char *ptr = NULL;

	#ifdef MOBI_DA_DUMMY_LIBRARY
	memprintf(&ptr, "Built with DeviceAtlas support (dummy library only).");
	#else
	memprintf(&ptr, "Built with DeviceAtlas support (library version %u.%u).", MOBI_DA_MAJOR, MOBI_DA_MINOR);
	#endif
	hap_register_build_opts(ptr, 1);
	}

	INITCALL1(STG_REGISTER, sample_register_convs, &conv_kws);

	REGISTER_POST_CHECK(init_deviceatlas);
	REGISTER_POST_DEINIT(deinit_deviceatlas);
	INITCALL0(STG_REGISTER, da_haproxy_register_build_options);