Simple conversion script that converts Godot html5 export to gzipped version, with decompressing wasm and pck files using pako

convert.sh

#!/bin/bash
### usage ./convert.sh game
## where game is baseName of the export
 
if [ ! "$1" ]; then
    read -p 'Game name: ' game
else
    game="$1"
fi

echo "gzipping wasm and pck files"

gzip -f "$game.wasm"
gzip -f "$game.pck"

f="$game.html"
if [ -f $f -a -r $f ]; then
f="$f"
else
f="index.html"
fi
 
inflate=$(cat <<\EOF
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e;f--,c+=a[o++]<<de,de+=8}e.adler=i.check=n(c),c=0,de=0,i.mode=M;case M:if(0===i.havedict)return e.next_out=s,e.avail_out=u,e.next_in=o,e.avail_in=f,i.hold=c,i.bits=de,B;e.adler=i.check=1,i.mode=K;case K:if(t===x||t===y)break e;case P:if(i.last){c>>>=7&de,de-=7&de,i.mode=ae;break}for(;de<3;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}switch(i.last=1&c,c>>>=1,de-=1,3&c){case 0:i.mode=Y;break;case 1:if(l(i),i.mode=Q,t===y){c>>>=2,de-=2;break e}break;case 2:i.mode=X;break;case 3:e.msg="invalid block type",i.mode=se}c>>>=2,de-=2;break;case Y:for(c>>>=7&de,de-=7&de;de<32;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if((65535&c)!=(c>>>16^65535)){e.msg="invalid stored block lengths",i.mode=se;break}if(i.length=65535&c,c=0,de=0,i.mode=q,t===y)break e;case q:i.mode=G;case G:if(he=i.length){if(he>f&&(he=f),he>u&&(he=u),0===he)break e;h.arraySet(r,a,o,he,s),f-=he,o+=he,u-=he,s+=he,i.length-=he;break}i.mode=K;break;case X:for(;de<14;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(i.nlen=257+(31&c),c>>>=5,de-=5,i.ndist=1+(31&c),c>>>=5,de-=5,i.ncode=4+(15&c),c>>>=4,de-=4,i.nlen>286||i.ndist>30){e.msg="too many length or distance symbols",i.mode=se;break}i.have=0,i.mode=W;case W:for(;i.have<i.ncode;){for(;de<3;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}i.lens[Ae[i.have++]]=7&c,c>>>=3,de-=3}for(;i.have<19;)i.lens[Ae[i.have++]]=0;if(i.lencode=i.lendyn,i.lenbits=7,Se={bits:i.lenbits},ye=k(_,i.lens,0,19,i.lencode,0,i.work,Se),i.lenbits=Se.bits,ye){e.msg="invalid code lengths set",i.mode=se;break}i.have=0,i.mode=J;case J:for(;i.have<i.nlen+i.ndist;){for(;Be=i.lencode[c&(1<<i.lenbits)-1],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(_e<16)c>>>=me,de-=me,i.lens[i.have++]=_e;else{if(16===_e){for(Ee=me+2;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(c>>>=me,de-=me,0===i.have){e.msg="invalid bit length repeat",i.mode=se;break}xe=i.lens[i.have-1],he=3+(3&c),c>>>=2,de-=2}else if(17===_e){for(Ee=me+3;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}de-=me,xe=0,he=3+(7&(c>>>=me)),c>>>=3,de-=3}else{for(Ee=me+7;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}de-=me,xe=0,he=11+(127&(c>>>=me)),c>>>=7,de-=7}if(i.have+he>i.nlen+i.ndist){e.msg="invalid bit length repeat",i.mode=se;break}for(;he--;)i.lens[i.have++]=xe}}if(i.mode===se)break;if(0===i.lens[256]){e.msg="invalid code -- missing end-of-block",i.mode=se;break}if(i.lenbits=9,Se={bits:i.lenbits},ye=k(g,i.lens,0,i.nlen,i.lencode,0,i.work,Se),i.lenbits=Se.bits,ye){e.msg="invalid literal/lengths set",i.mode=se;break}if(i.distbits=6,i.distcode=i.distdyn,Se={bits:i.distbits},ye=k(v,i.lens,i.nlen,i.ndist,i.distcode,0,i.work,Se),i.distbits=Se.bits,ye){e.msg="invalid distances set",i.mode=se;break}if(i.mode=Q,t===y)break e;case Q:i.mode=V;case V:if(f>=6&&u>=258){e.next_out=s,e.avail_out=u,e.next_in=o,e.avail_in=f,i.hold=c,i.bits=de,m(e,ce),s=e.next_out,r=e.output,u=e.avail_out,o=e.next_in,a=e.input,f=e.avail_in,c=i.hold,de=i.bits,i.mode===K&&(i.back=-1);break}for(i.back=0;Be=i.lencode[c&(1<<i.lenbits)-1],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(ke&&0==(240&ke)){for(ge=me,ve=ke,pe=_e;Be=i.lencode[pe+((c&(1<<ge+ve)-1)>>ge)],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(ge+me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}c>>>=ge,de-=ge,i.back+=ge}if(c>>>=me,de-=me,i.back+=me,i.length=_e,0===ke){i.mode=ne;break}if(32&ke){i.back=-1,i.mode=K;break}if(64&ke){e.msg="invalid literal/length code",i.mode=se;break}i.extra=15&ke,i.mode=$;case $:if(i.extra){for(Ee=i.extra;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}i.length+=c&(1<<i.extra)-1,c>>>=i.extra,de-=i.extra,i.back+=i.extra}i.was=i.length,i.mode=ee;case ee:for(;Be=i.distcode[c&(1<<i.distbits)-1],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(0==(240&ke)){for(ge=me,ve=ke,pe=_e;Be=i.distcode[pe+((c&(1<<ge+ve)-1)>>ge)],me=Be>>>24,ke=Be>>>16&255,_e=65535&Be,!(ge+me<=de);){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}c>>>=ge,de-=ge,i.back+=ge}if(c>>>=me,de-=me,i.back+=me,64&ke){e.msg="invalid distance code",i.mode=se;break}i.offset=_e,i.extra=15&ke,i.mode=te;case te:if(i.extra){for(Ee=i.extra;de<Ee;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}i.offset+=c&(1<<i.extra)-1,c>>>=i.extra,de-=i.extra,i.back+=i.extra}if(i.offset>i.dmax){e.msg="invalid distance too far back",i.mode=se;break}i.mode=ie;case ie:if(0===u)break e;if(he=ce-u,i.offset>he){if((he=i.offset-he)>i.whave&&i.sane){e.msg="invalid distance too far back",i.mode=se;break}he>i.wnext?(he-=i.wnext,be=i.wsize-he):be=i.wnext-he,he>i.length&&(he=i.length),we=i.window}else we=r,be=s-i.offset,he=i.length;he>u&&(he=u),u-=he,i.length-=he;do{r[s++]=we[be++]}while(--he);0===i.length&&(i.mode=V);break;case ne:if(0===u)break e;r[s++]=i.length,u--,i.mode=V;break;case ae:if(i.wrap){for(;de<32;){if(0===f)break e;f--,c|=a[o++]<<de,de+=8}if(ce-=u,e.total_out+=ce,i.total+=ce,ce&&(e.adler=i.check=i.flags?w(i.check,r,ce,s-ce):b(i.check,r,ce,s-ce)),ce=u,(i.flags?c:n(c))!==i.check){e.msg="incorrect data check",i.mode=se;break}c=0,de=0}i.mode=re;case re:if(i.wrap&&i.flags){for(;de<32;){if(0===f)break e;f--,c+=a[o++]<<de,de+=8}if(c!==(4294967295&i.total)){e.msg="incorrect length check",i.mode=se;break}c=0,de=0}i.mode=oe;case oe:ye=E;break e;case se:ye=A;break e;case fe:return z;case le:default:return Z}return e.next_out=s,e.avail_out=u,e.next_in=o,e.avail_in=f,i.hold=c,i.bits=de,(i.wsize||ce!==e.avail_out&&i.mode<se&&(i.mode<ae||t!==p))&&d(e,e.output,e.next_out,ce-e.avail_out)?(i.mode=fe,z):(ue-=e.avail_in,ce-=e.avail_out,e.total_in+=ue,e.total_out+=ce,i.total+=ce,i.wrap&&ce&&(e.adler=i.check=i.flags?w(i.check,r,ce,e.next_out-ce):b(i.check,r,ce,e.next_out-ce)),e.data_type=i.bits+(i.last?64:0)+(i.mode===K?128:0)+(i.mode===Q||i.mode===q?256:0),(0===ue&&0===ce||t===p)&&ye===S&&(ye=R),ye)},i.inflateEnd=function(e){if(!e||!e.state)return Z;var t=e.state;return t.window&&(t.window=null),e.state=null,S},i.inflateGetHeader=function(e,t){var i;return e&&e.state?0==(2&(i=e.state).wrap)?Z:(i.head=t,t.done=!1,S):Z},i.inflateSetDictionary=function(e,t){var i,n,a=t.length;return e&&e.state?0!==(i=e.state).wrap&&i.mode!==M?Z:i.mode===M&&(n=1,(n=b(n,t,a,0))!==i.check)?A:d(e,t,a,a)?(i.mode=fe,z):(i.havedict=1,S):Z},i.inflateInfo="pako inflate (from Nodeca project)"},{"../utils/common":1,"./adler32":3,"./crc32":5,"./inffast":7,"./inftrees":9}],9:[function(e,t,i){"use strict";var n=e("../utils/common"),a=[3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258,0,0],r=[16,16,16,16,16,16,16,16,17,17,17,17,18,18,18,18,19,19,19,19,20,20,20,20,21,21,21,21,16,72,78],o=[1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0],s=[16,16,16,16,17,17,18,18,19,19,20,20,21,21,22,22,23,23,24,24,25,25,26,26,27,27,28,28,29,29,64,64];t.exports=function(e,t,i,f,l,d,u,c){var h,b,w,m,k,_,g,v,p,x=c.bits,y=0,S=0,E=0,B=0,Z=0,A=0,z=0,R=0,N=0,O=0,C=null,I=0,T=new n.Buf16(16),U=new n.Buf16(16),D=null,F=0;for(y=0;y<=15;y++)T[y]=0;for(S=0;S<f;S++)T[t[i+S]]++;for(Z=x,B=15;B>=1&&0===T[B];B--);if(Z>B&&(Z=B),0===B)return l[d++]=20971520,l[d++]=20971520,c.bits=1,0;for(E=1;E<B&&0===T[E];E++);for(Z<E&&(Z=E),R=1,y=1;y<=15;y++)if(R<<=1,(R-=T[y])<0)return-1;if(R>0&&(0===e||1!==B))return-1;for(U[1]=0,y=1;y<15;y++)U[y+1]=U[y]+T[y];for(S=0;S<f;S++)0!==t[i+S]&&(u[U[t[i+S]]++]=S);if(0===e?(C=D=u,_=19):1===e?(C=a,I-=257,D=r,F-=257,_=256):(C=o,D=s,_=-1),O=0,S=0,y=E,k=d,A=Z,z=0,w=-1,N=1<<Z,m=N-1,1===e&&N>852||2===e&&N>592)return 1;for(;;){g=y-z,u[S]<_?(v=0,p=u[S]):u[S]>_?(v=D[F+u[S]],p=C[I+u[S]]):(v=96,p=0),h=1<<y-z,E=b=1<<A;do{l[k+(O>>z)+(b-=h)]=g<<24|v<<16|p|0}while(0!==b);for(h=1<<y-1;O&h;)h>>=1;if(0!==h?(O&=h-1,O+=h):O=0,S++,0==--T[y]){if(y===B)break;y=t[i+u[S]]}if(y>Z&&(O&m)!==w){for(0===z&&(z=Z),k+=E,R=1<<(A=y-z);A+z<B&&!((R-=T[A+z])<=0);)A++,R<<=1;if(N+=1<<A,1===e&&N>852||2===e&&N>592)return 1;l[w=O&m]=Z<<24|A<<16|k-d|0}}return 0!==O&&(l[k+O]=y-z<<24|64<<16|0),c.bits=Z,0}},{"../utils/common":1}],10:[function(e,t,i){"use strict";t.exports={2:"need dictionary",1:"stream end",0:"","-1":"file error","-2":"stream error","-3":"data error","-4":"insufficient memory","-5":"buffer error","-6":"incompatible version"}},{}],11:[function(e,t,i){"use strict";t.exports=function(){this.input=null,this.next_in=0,this.avail_in=0,this.total_in=0,this.output=null,this.next_out=0,this.avail_out=0,this.total_out=0,this.msg="",this.state=null,this.data_type=2,this.adler=0}},{}],"/lib/inflate.js":[function(e,t,i){"use strict";function n(e){if(!(this instanceof n))return new n(e);this.options=o.assign({chunkSize:16384,windowBits:0,to:""},e||{});var t=this.options;t.raw&&t.windowBits>=0&&t.windowBits<16&&(t.windowBits=-t.windowBits,0===t.windowBits&&(t.windowBits=-15)),!(t.windowBits>=0&&t.windowBits<16)||e&&e.windowBits||(t.windowBits+=32),t.windowBits>15&&t.windowBits<48&&0==(15&t.windowBits)&&(t.windowBits|=15),this.err=0,this.msg="",this.ended=!1,this.chunks=[],this.strm=new d,this.strm.avail_out=0;var i=r.inflateInit2(this.strm,t.windowBits);if(i!==f.Z_OK)throw new Error(l[i]);this.header=new u,r.inflateGetHeader(this.strm,this.header)}function a(e,t){var i=new n(t);if(i.push(e,!0),i.err)throw i.msg||l[i.err];return i.result}var r=e("./zlib/inflate"),o=e("./utils/common"),s=e("./utils/strings"),f=e("./zlib/constants"),l=e("./zlib/messages"),d=e("./zlib/zstream"),u=e("./zlib/gzheader"),c=Object.prototype.toString;n.prototype.push=function(e,t){var i,n,a,l,d,u,h=this.strm,b=this.options.chunkSize,w=this.options.dictionary,m=!1;if(this.ended)return!1;n=t===~~t?t:!0===t?f.Z_FINISH:f.Z_NO_FLUSH,"string"==typeof e?h.input=s.binstring2buf(e):"[object ArrayBuffer]"===c.call(e)?h.input=new Uint8Array(e):h.input=e,h.next_in=0,h.avail_in=h.input.length;do{if(0===h.avail_out&&(h.output=new o.Buf8(b),h.next_out=0,h.avail_out=b),(i=r.inflate(h,f.Z_NO_FLUSH))===f.Z_NEED_DICT&&w&&(u="string"==typeof w?s.string2buf(w):"[object ArrayBuffer]"===c.call(w)?new Uint8Array(w):w,i=r.inflateSetDictionary(this.strm,u)),i===f.Z_BUF_ERROR&&!0===m&&(i=f.Z_OK,m=!1),i!==f.Z_STREAM_END&&i!==f.Z_OK)return this.onEnd(i),this.ended=!0,!1;h.next_out&&(0!==h.avail_out&&i!==f.Z_STREAM_END&&(0!==h.avail_in||n!==f.Z_FINISH&&n!==f.Z_SYNC_FLUSH)||("string"===this.options.to?(a=s.utf8border(h.output,h.next_out),l=h.next_out-a,d=s.buf2string(h.output,a),h.next_out=l,h.avail_out=b-l,l&&o.arraySet(h.output,h.output,a,l,0),this.onData(d)):this.onData(o.shrinkBuf(h.output,h.next_out)))),0===h.avail_in&&0===h.avail_out&&(m=!0)}while((h.avail_in>0||0===h.avail_out)&&i!==f.Z_STREAM_END);return i===f.Z_STREAM_END&&(n=f.Z_FINISH),n===f.Z_FINISH?(i=r.inflateEnd(this.strm),this.onEnd(i),this.ended=!0,i===f.Z_OK):n!==f.Z_SYNC_FLUSH||(this.onEnd(f.Z_OK),h.avail_out=0,!0)},n.prototype.onData=function(e){this.chunks.push(e)},n.prototype.onEnd=function(e){e===f.Z_OK&&("string"===this.options.to?this.result=this.chunks.join(""):this.result=o.flattenChunks(this.chunks)),this.chunks=[],this.err=e,this.msg=this.strm.msg},i.Inflate=n,i.inflate=a,i.inflateRaw=function(e,t){return t=t||{},t.raw=!0,a(e,t)},i.ungzip=a},{"./utils/common":1,"./utils/strings":2,"./zlib/constants":4,"./zlib/gzheader":6,"./zlib/inflate":8,"./zlib/messages":10,"./zlib/zstream":11}]},{},[])("/lib/inflate.js")});</script>
EOF
)
inflate=$(echo $inflate | sed -e 's/[\/&]/\\&/g')

find="<script type=\"text/javascript\" src=\"$game.js\"></script>"
replace="$inflate<script type=\"text/javascript\" src=\"$game.js\"></script>"
if grep -q "'$game.js'" "$f"; then
    echo "using 3.1 version"
    find="<script type='text/javascript' src='$game.js'></script>"
    replace="$inflate<script type='text/javascript' src='$game.js'></script>"
fi    

if [[ "$OSTYPE" = *"linux"* ]]; then
SED="sed -i\"\""
else
SED="sed -i \"\""
fi

echo "placing paco inside $f..."
$SED -e "s@$find@$replace@" "$f"

echo "modifying $game.js to load gziped files..."
find="function loadXHR(resolve, reject, file, tracker) {"
replace=$(cat <<\EOF
    function loadXHR(resolve, reject, file, tracker) {  if (file.substr(-5) === '.wasm' || file.substr(-4) === '.pck') { file += '.gz'; var resolve_orig = resolve; resolve = function(xhr) { return resolve_orig(xhr.responseURL.substr(-3) === '.gz' ? { response: pako.inflate(xhr.response),    responseType: xhr.responseType, responseURL: xhr.responseURL, status: xhr.status,   statusText: xhr.statusText } : xhr); }; }
EOF
)

$SED -e "s@$find@$replace@" "$game.js"

can we use it for 7z compression instead of gzip

No, as web browsers only support gzip and Brotli compression. The 7Z format uses LZMA2 compression.

Thank you, but the gzip size i getting larger for my .wasm it nears 38MB I want it to get it around 18-20MB
for in work and the original size of my .wasm is 131MB can you help to reduce it?

can we use it for 7z compression instead of gzip

No, as web browsers only support gzip and Brotli compression. The 7Z format uses LZMA2 compression.

But the compression of 7z is getting less than the gzip size how to use it for loading and preloading the .wasm and .pck with a .7z extension can help with this, please?

Sir, please give me a reply on how to use it
and how to compress the file up to 20 MB from 131MB for Gzip file compression.

Is there any one to solve my problem?

@havana24 @Atem1995
About `incorrect header check error:
I solved this error and upload my game at CrazyGames QATool and works ok:
1- Comment or remove this lines:

// if (file.endsWith(".wasm") || file.endsWith(".pck")) {
//		file += ".gz"
//	}

2- Rename Gzipped .wasm and .pck files and remove .gz extension.
And now my game runs ok on both local and remote servers.