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esp32_https_server/src/util.cpp at master · open-morphs/esp32_https_server · GitHub
This repository was archived by the owner on Dec 29, 2023. It is now read-only.
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util.cpp
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98 lines (86 loc) · 2.04 KB
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esp32_https_server
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src
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util.cpp
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#
include
"
util.hpp
"
namespace
httpsserver
{
uint32_t
parseUInt
(std::string
const
&s,
uint32_t
max) {
uint32_t
i =
0
;
//
value
//
Check sign
size_t
x =
0
;
if
(s[
0
]==
'
+
'
) {
x =
1
;
}
//
We device max by 10, so we can check if we would exceed it by the next *10 multiplication
max/=
10
;
//
Convert by base 10
for
(; x < s.
size
(); x++) {
char
c = s[x];
if
(i < max) {
if
(c >=
'
0
'
&& c<=
'
9
'
) {
i = i*
10
+ (c-
'
0
'
);
}
else
{
break
;
}
}
else
{
return
max;
}
}
return
i;
}
int32_t
parseInt
(std::string
const
&s) {
uint32_t
max =
0x7fffffff
;
if
(s[
0
]==
'
-
'
) {
return
-
1
*
parseUInt
(s.
substr
(
1
,max));
}
return
parseUInt
(s,max);
}
std::string
intToString
(
int
i) {
if
(i==
0
) {
return
"
0
"
;
}
//
We need this much digits
int
digits =
ceil
(
log10
(i+
1
));
char
c[digits+
1
];
c[digits] =
'
\0
'
;
for
(
int
x = digits-
1
; x >=
0
; x--) {
char
v = (i%
10
);
c[x] =
'
0
'
+ v;
i = (i-v)/
10
;
}
return
std::string
(c);
}
}
std::string
urlDecode
(std::string input) {
std::
size_t
idxReplaced =
0
;
//
First replace + by space
std::
size_t
idxFound = input.
find
(
'
+
'
);
while
(idxFound != std::string::npos) {
input.
replace
(idxFound,
1
,
1
,
'
'
);
idxFound = input.
find
(
'
+
'
, idxFound +
1
);
}
//
Now replace percent-escapes
idxFound = input.
find
(
'
%
'
);
while
(idxFound != std::string::npos) {
if
(idxFound <= input.
length
() +
3
) {
char
hex[
2
] = { input[idxFound+
1
], input[idxFound+
2
] };
byte val =
0
;
for
(
int
n =
0
; n <
sizeof
(hex); n++) {
val <<=
4
;
if
(
'
0
'
<= hex[n] && hex[n] <=
'
9
'
) {
val += hex[n]-
'
0
'
;
}
else
if
(
'
A
'
<= hex[n] && hex[n] <=
'
F
'
) {
val += hex[n]-
'
A
'
+
10
;
}
else
if
(
'
a
'
<= hex[n] && hex[n] <=
'
f
'
) {
val += hex[n]-
'
a
'
+
10
;
}
else
{
goto
skipChar;
}
}
input.
replace
(idxFound,
3
,
1
, (
char
)val);
}
skipChar:
idxReplaced = idxFound +
1
;
idxFound = input.
find
(
'
%
'
, idxReplaced);
}
return
input;
}
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